analog circuit design volume 3 the design note collection pdf

Analog Circuit Design Volume The Design Note Collection www.TechnicalBooksPDF.com This page is intentionally left blank www.TechnicalBooksPDF.com Analog Circuit Design Volume The Design Note Collection Edited by Bob Dobkin and John Hamburger AMSTERDAM • BOSTON • HEIDELBERG • LONDON • NEW YORK • OXFORD PARIS • SAN DIEGO • SAN FRANCISO • SINGAPORE • SYDNEY • TOKYO Newnes is an imprint of Elsevier www.TechnicalBooksPDF.com Newnes Newnes is an imprint of Elsevier 225 Wyman Street, Waltham, MA 02451, USA The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, UK First edition 2015 Copyright ùẵâ 2015, Linear Technology Corporation Published by Elsevier Inc All rights reserved See separate Publisher’s Note for copyright details of Trade Marks used in this book The right of Linear Technology Corporation to be identified as the author of this work has been asserted in accordance with the Copyright, Designs and Patents Act 1988 No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, mechanical, photocopying, recording or otherwise without the prior written permission of the publisher Permissions may be sought directly from Elsevier’s Science & Technology Rights Department in Oxford, UK: phone (+44) (0) 1865 843830; fax (+44) (0) 1865 853333; email: permissions@elsevier.com Alternatively you can submit your request online by visiting the Elsevier web site at http://elsevier.com/locate/permissions, and selecting Obtaining permission to use Elsevier material Notice No responsibility is assumed by the publisher or authors/contributors for any injury and/or damage to persons or property as a matter of products liability, negligence or otherwise, or from any use or operation of any methods, products, instructions or ideas contained in the material herein Because of rapid advances in the medical sciences, in particular, independent verification of diagnoses and drug dosages should be made Library of Congress Cataloging-in-Publication Data A catalog record for this book is available from the Library of Congress British Library Cataloguing in Publication Data A catalogue record for this book is available from the British Library ISBN: 978-0-12-800001-4 For information on all Newnes publications visit our web site at books.elsevier.com Printed and bound in The United States of America 14╇15╇16╇17╇18 â•… 10╇9╇8╇7╇6╇5╇4╇3╇2╇1 Cover photo by Anne Hamersky www.TechnicalBooksPDF.com Dedicated to all the authors of these Design Notes And to analog engineers everywhere in hopes that we will continue to develop more www.TechnicalBooksPDF.com This page is intentionally left blank www.TechnicalBooksPDF.com For Sandra, Naomi, David and Sarah, the bright lights in my analog world www.TechnicalBooksPDF.com This page is intentionally left blank www.TechnicalBooksPDF.com Contents Publisher’s Note xxv Acknowledgments xxxv Introduction xxxvii Foreword xxxix PART Power Management�����������������������������������������������������������������������������������1 Section Power Management Design High performance single phase DC/DC controller with power system management One device replaces battery charger, pushbutton controller, LED driver and voltage regulator ICs in portable electronics Simple circuit replaces and improves on power modules at less than half the price Wide input range, high efficiency DDR termination power supply achieves fast transient response 11 Minimize input capacitors in multioutput, high current power supplies 13 Dual phase high efficiency mobile CPU power supply minimizes size and thermal stress 15 SOT-23 SMBus fan speed controller extends battery life and reduces noise 17 Active voltage positioning reduces output capacitors 19 5 V to 3.3 V circuit collection 21 10 Hex level shift shrinks board space 23 Section Microprocessor Power Design 25 11 Cost effective, low profile, high efficiency 42 A supply powers AMD Hammer processors 27 12 Efficient, compact 2-phase power supply delivers 40A to Intel mobile CPUs 29 13 Microprocessor core supply voltage set by I2C bus without VID lines 31 14 High efficiency I/O power generation for mobile Pentium III microprocessors 33 15 PolyPhase sur face mount power supply meets AMD Athlon processor requirements with no heat sink 35 16 2-step voltage regulation improves performance and decreases CPU temperature in portable computers 37 17 Dual regulators power Pentium processor or upgrade CPU 39 18 Big power for big processors: a synchronous regulator 41 19 High efficiency power sources for Pentium processors 43 20 Fast regulator paces high performance processors 45 21 Techniques for deriving 3.3 V from 5 V supplies 47 22 Regulator circuit generates both 3.3 V and 5 V outputs from 3.3 V or 5 V to run computers and RS232 49 www.TechnicalBooksPDF.com SECTION 35 RMS to DC Conversion Rgm = 60k The 330pF capacitor (C4) sets a 200kHz corner frequency and is used for data rates above 115kbps For low data rates (115kbps and below), the capacitance at Pin is increased by taking Pin to a TTL high This switches C1 in parallel with C4, lowering the highpass filter breakpoint A 10nF capacitor (C1) produces a 6.6kHz corner Signals processed by the preamp/gm amplifier combination cause the comparator output to swing low IrDA SIR The LT1328 circuit in Figure 506.1 operates over the full 1cm to 1m range of the IrDA standard at the stipulated light levels For IrDA data rates of 115kbps and below, a 1.6μs pulse width is used for a zero and no pulse for a one Light levels are 40mW/sr (watts per steradian) to 500mW/sr Figure 506.4 shows a scope photo for a transmitter input (bottom trace) and the LT1328 output (top trace) Note that the input to the transmitter is inverted; that is, transmitted light produces a high at the input, which results in a zero at the output of the transmitter The MODE pin (Pin 7) should be high for these data rates Figure 506.5 • IrDA-FIR Modulation over all of the above conditions at 1.152Mbps Pin should be held low for these data rates and above 4ppm The last IrDA encoding method is for 4Mbps and uses pulse position modulation, thus its name: 4ppm Two bits are encoded by the location of a 125ns wide pulse at one of the four positions within a 500ns interval (2 bits · 1/500ns = 4Mbps) Range and input levels are the same as for 1.152Mbps Figure 506.6 shows the LT1328 reproduction of this modulation Figure 506.4 • IrDA-SIR Modulation IrDA FIR The second fastest tier of the IrDA standard addresses 576kbps and 1.152Mbps data rates, with pulse widths of 1/4 of the bit interval for zero and no pulse for one The 1.152Mbps rate, for example, uses a pulse width of 217ns; the total bit time is 870ns Light levels are 100mW/sr to 500mW/sr over the 1cm to 1meter range A photo of a transmitted input and LT1328 output is shown in Figure 506.5 The LT1328 output pulse width will be less than 800ns wide 1090 Figure 506.6 • IrDA-4ppm Modulation Conclusion In summary, the LT1328 can be used to build a low cost receiver compatible with IrDA standards Its ease of use and flexibility also allow it to provide solutions to numerous other photodiode receiver applications The tiny MSOP package saves on PC board area Telephone ring-tone generation 507 Dale Eagar Requirements Not your standard bench supply When your telephone rings, exactly what is the phone company doing? This question comes up frequently, as it seems everyone is becoming a telephone company Deregulation opens many new opportunities, but if you want to be the phone company you have to ring bells Ring-tone generation requires not one but two high voltages, 60VDC and −180VDC (this arises from the need to put 87VRMS on −48VDC) Figure 507.1 details the switching power supply that delivers the volts needed to run the ring-tone circuit This switcher can be powered from any voltage from 5V to 30V and shuts down when not in use Figure 507.2 is the build diagram of the transformer used in the switching power supply An open-architecture ring-tone generator Quad op amp rings phones Here is a design that you can own, tailor to your specific needs, layout on your circuit board and put on your bill of materials Finally, you will be in control of the black magic (and high voltages) of ring-tone generation When a phone rings, it rings with a cadence, a sequence of rings and pauses The standard cadence is one second ringing followed by two seconds of silence We use the first 1/4 of Figure 507.1 • The Switching Power Supply Figure 507.2 • Ring-Tone High Voltage Transformer Build Diagram Analog Circuit Design: Design Note Collection http://dx.doi.org/10.1016/B978-0-12-800001-4.00507-X © 2015 Linear Technology Corporation Published by Elsevier Inc All rights reserved SECTION 35 RMS to DC Conversion LT1491 as a cadence oscillator, whose output is at VCC for one second and then at VEE for two seconds This sequence repeats every three seconds, producing the all-too-familiar pattern The actual ringing of the bell is done by a 20Hz AC sine wave signal at a signal level of 87VRMS superimposed on −48VDC The 20Hz signal is implemented with the second amplifier in the LT1491 which acts as a gated 20Hz oscillator (see Figure 507.3) The third amplifier in the LT1491, which is configured as a lowpass filter, converts the square wave output of the oscillator to a sine wave by filtering out unwanted harmonics Finally, the 87VRMS and the −48VDC parts are handled by the fourth amplifier in the LT1491 and its steering of two external 15V regulators The rest of what we do, the part that is most difficult to follow, involves the output amplifier In the output amplifier, the 6VP–P signal from the waveform synthesizer is imposed across R12 (see Figure 507.4) into a virtual ground, creating a sine wave signal current This current is added to the DC current flowing through R15 and the resulting current is imposed across R13 This stage amplifies the sine wave and offsets it to become an 87VRMS sine wave imposed on a −48VDC bias The trick here is that the voltage gain is in the ±15V regulators, not the LT1491 which is merely steering currents This complete circuit (Figure 507.4) includes the ring-trip sense circuit to detect when the phone receiver is picked up This circuit is fully protected for output shorts to any voltage within the power supply window of −180V to 60V Figure 507.3 • Wave Form Synthesizer Figure 507.4 • Complete Ring-Tone Generator Circuit 1092 Index A AAA alkaline cells, 934 AC-coupled LTC6400-20 differential amplifier, 897 AC-coupled video signals, handling, 692 Accurate current measurement, 981 ACPR status pin, 434 Active bridge rectifiers, 569 Active voltage positioning (AVP), 19, 86 Adaptable power supply rail (APS), 153 Adaptable power supply using LTC1773, 153–154 Adaptive Power mode, 209 ADIN pin, 542 Adjustable video cable equalizer, 695–696 Adjustable/synchronizable switching frequency, 301 ADSL technology, 1085 AdvancedTCA, 539–541, 543 Airplane and truck lights buck-boost controller for, 609 All surface mount lithium-ion charger, 454 All-ceramic capacitor, 441–442 AltCPR measurements, 1078 Aluminum electrolytics, 59 AM26LS30, 845 Ambient energy sources, 479–480 AMD Athlon processor, 35–36 AMD Hammer Microprocessor Power Supply (42A), 27–28 AMD Hammer processors, 27 AMD Opteron and Athlon 64 processors, 139 AMD79R79 SLIC device, 839 Amplified attenuator and attenuated PGA, 781–782 Amplifier precision, 981 Analog baseband filtering, 1075 Analog circuit design, 43 Analog current limit (ACL) threshold, 532 Analog-to-digital (A/D) conversion for 3V systems, 770 Analog-to-digital converter (ADC), 737, 739, 910, 1079 6-channel SAR, 873 12-bit, 675, 719, 755, 761 with sequencer simplifiers multiple-input applications, 731 resistive touchscreen interface, 762 in SO-8 package, 761–762 16-bit, 729, 749 data reception pseudocode, 730 data transfer, 729–730 power and analog inputs, 730 16-Channel, 24-bit ΔΣ ADC, 24, 791–792 digital cold junction compensation, 739–740 RTD temperature digitizer, 740 Antialiasing 10MHz filters, 1004 APS SENSE lead, 153–154 ATCA connector pin, 539 A-to-D converter, 733 down conversion with, 733–734 Automatic Burst Mode operation, 680 Automatic equalization, 695 Automatic power shutdown control, 857–858 Automatic restart waveforms, 556 Automatic test equipment (ATE) systems, 917 Automotive LED driver, 631 Automotive power monitoring, 675 Automotive systems, monitoring, 681 H-bridge problem, solving, 682 simple current monitoring solutions, 681–682 Avalanche photo diode (APD), 1067, 1083 bias topology with fast current monitor transient response, 1067–1068 AVX-TPS tantalum capacitor, 207 B Backup, 457 Backup power applications, 513–514 Bandpass filter, 4th order, 1002 Barometric pressure measurement, 721 BASIC, 800 Basic receiver design, 1074 BAT pin, 451–452 Battery and AC adapter, automatic switchover between, 459–460 Battery charger/power manager system, 670 Battery Fed System, 423 Battery monitor circuit, 986 Battery pack protection, 449 Battery series resistance (BSR), 418 Battery-fed system, 421–422 Battery-powered RS232 to dual smart card interface, 821 Bidirectional signals, unipolar processing of, 994 Bidirectional video bus, 701 Binary modulation schemes, 926 Boost converter, 247, 302, 674 2-phase, 248, 671 4-phase, 673–674 Boyle model, 967 Broadband random noise generator, 951–952 Buck converter, 99 Buck mode LED driver, 617 driving 200mA LED strings, 618 driving three 500mA LED strings, 618 surviving load dump events, 618 Buck regulator, 93–94 Buck-boost controller, 609 driving 100W LED string, 609 36V, 2.5A SLA battery charger, 609–610 120W, 6V to 55V voltage regulator, 610, 610 Buck-boost LED driver, 634 Burst Mode clamp, 95 Burst Mode efficiency, 271 Burst Mode operation, 264, 287–288, 344 vs constant frequency, 485–486 Butterworth filter, 932, 946 Bypass pin (BYP), 349 C Capacitance buffering, 819–820 Capacitive loads, driving, 942 Capacitor impedance, 59 Capacitor technology considerations, 59–60 CCFL backlight application, 272 CCFL backlight inverter for desktop displays (12W), 653 CCFLs, 613 Cell phones, 624 with backlighting, vibrator motor and sound controller, 624 Cellular telephones/cameras, 637 flashlamp illumination circuitry for, 637–638 Ceramic capacitors, 59–60, 162 8-Channel data acquisition system, 814 Charge cycle, 450 Charge-coupled device (CCD), 942 Charge-pump inverter, 877–878 Chebyshev filters, 1010 Chopper amplifiers, 1027–1028 Chopper op amp technology, 965–966 Chopper vs bipolar op amps, 963–964 CHRG pin, 428 CHRG status pin, 434 Circuit “trick” for a gain of less than 10, 1086 “Clip-on” probe, 657 CLKIN pin, 94, 379 CLKOUT pin, 116, 304 CLKOUT signal, 94 C-Load op amps driving ADCs, 943–944 Index remaining stable in face of difficult loads, 944 taming instabilities, 949–950 Closed loop control with data acquisition systems, 807–808 CMOS circuits, 964 CMOS technologies, 867 CMRR, 970 Cold cathode fluorescent lamp (CCFL) power supply, 338, 649–650, 657, 659 for floating lamp configuration, 656 for grounded lamp configuration, 655 low input voltage, 655–656 LT1768 dual CCFL backlight inverter, 649–650 Common mode rejection ratio (CMRR), 893–894 COMP pin, 354 CompactPCI bus, 559 application, 559–560 LTC1643, 559–560 Competitive reference, 995–996 Complete 2-cell Li-Ion charger, 450 COMPOUT, 550 Constant-current/constant-voltage (CC/CV) charging, 455, 608 CPU core voltage regulator for 1-step application, 38 CPU power supplies, 307 × Crosspoint, 697–698 Crosstalk, 700 Cuk converter, 302 Current calibrator, 658 Current feedback amplifier (CFAs), 941 capacitive loads, driving, 942 “do’s and dont’s”, 959–960 transformer-coupled loads, driving, 941–942 D DAC amplifier, 912 DAC output amplifier, 915–916 Data acquisition system, 805 circuit description, 805–806 LTC1090 family, 815 serial communications, advantages of, 815–816 sharing serial interface, 816 speed limit, 816 talking to MPUs without serial ports, 816 talking to serial port MPUs, 816 Data communication equipment (DCE), 845 DB32, DB20 and DB13 form factors, power solutions for, 562 DC accurate filter, 1029–1030 DC coupled differential amplifier, 897–898 DC restore circuits, 704 DC-coupled dual composite video driver, 691 DCR auto-calibration, DC-to-DC power conversion, 335 Decade wide bandpass filters, 1023 1094 Delta-sigma ADCs, 725 Delta-sigma converters, 727–728 Demo board DC009, 957 high speed layout techniques, 957 optional components, 957 supply bypass capacitors, 957–958 Design Note (DN6), 937 Design Note 72 (DN72), 225 Desktop LCD displays high power CCFL backlight inverter for, 653–654 Desktop/portable VID DC/DC converter, 32 Device Bay, 561 DB32, DB20 and DB13 form factors, power solutions for, 562 power requirements, 561–562 Vid_3.3V, power solution for, 562 Differential I/O amplifier, 895 background, 895 simple single-ended connection of, 895–896 single-ended transimpedance amplifier, 896 Differential to single-ended converter, 743 Differential-in/differential-out CMOS amplifier core, 909 Digital cold junction compensation, 739–740 Digital filtering sampling of signals for, 813 4th order elliptic filter, 814 8-channel data acquisition system, 814 gated measurements of fast signals, 814 LTC1090 sample and hold, 813–814 Digital filters, 803 Digital power system management, 369 Digital voltmeters (DVMs), 891 Digitally controlled attenuator and PGA, 781 Digital-to-analog converters (DACs), 775 Dimming control, 642, 644, 648 3-Diode mode (3DM), 440 Direct conversion radio receiver, 1073 Direct-to-digital IF receiver with variable gain, 1061 IF receiver performance, 1061 measurement details and receiver circuit, 1061–1062 DISABLE input, 23–24 Discontinuous mode (DCM), 298, 500 Discrete multitone modulation (DMT), 1088 Display data channel (DDC), 687 Double Data Rate (DDR) memory, 11 Downconversion with A-to-D converter, 733–734 Driver supply pin (DRV), 267 Driving N-channel MOSFETs, 215–216 Dropout, 457 Dropout voltage, enhancing, 461–462 Dual μModule regulator, 369–370 Dual 1.5V/20A and 1.2V/20A converter, 91 Dual band mobile phone, 1081–1082 Dual battery power manager, 439 Dual buck 1.5A LED driver, 630 Dual channel Hot Swap controller/ power sequencer, 557 basic operation, 557–558 power supply tracking and sequencing, 558 Dual current-sense amplifiers, 983 measuring load current in H-bridge simple solution, 984 Dual input pair zaps common mode noise pickup, 689–690 Dual LDOs, 344 Dual level current control, 547–548 Dual monolithic ideal diode, 407 Dual monolithic step-down switching regulator, 117 Dual output buck regulator, 95 Dual output step-down controller, 91–92 Dual output synchronous boost converter, 667–668 advantages of, 667 Dual-phase switching, 16 “Dying gasp” applications, 103–104 E “Easy Drive” delta-sigma analog-todigital converters, 727–728 on-chip buffers, 728 working of, 727–728 Easy output voltage programming, 993–994 Economical SXGA/HD cable driver, 686 Effective series resistance per capacitance (ESR/C), 517–518 Efficiency for the circuit, 36, 42 Efficiency vs load current, 28, 43 EIA RS485 data transmission standard, 853 Electric double layer capacitors (EDLCs), 517 Electrically isolating data acquisition systems, 809 alternatives, 809–810 circuit description, 809 Electromagnetic interference (EMI), 209 compliance tests, 55 controlling, 60 Electronic Circuit Breaker (ECB), 537 application, 537–538 Electronics 101, 521 Electrostatic discharge (ESD), 851 damage, 867 protection, 850–852 PC board for, 852 testing for RS232 interface circuits, 847–848 Elliptic filter, 4th order, 814 Elliptic lowpass filter, 4th order, 1002 EN (Enable) pin, 428 Equivalent series resistance (ESR), 19–20, 240 Error sources, accounting for, 419–420 Ethernet systems, 701 Extended digital interface data (EDID), 687 External N-channel MOSFETs, 592 External power input, 81 F Fast current monitor transient response, 1067–1068 Fast pulse detector, 954 Fast signals, gated measurements of, 814 Faster data transfer requirements, 155 FAULT pin, 428 Fault-tolerant systems, 603 FCB pin, 101–102, 194 Feature-rich controller, 677–678 FETKY MOSFETs, 206 Fiber optic communication systems, 1083–1084 Field-effect transistors (FETs), 891 Filter circuit, 548 FilterCAD 3.0 (FCAD), 1011 examples, 1011–1012 linear phase lowpass filters, 1011 FilterCAD program, 1024 FireWire power sources, 155 Firmware solutions, 585 FLAG function, 447 “Flash” type memories, 291–292 Flashlamp circuitry, for cellular telephones/cameras, 637–638 Floating CCFL with dual polarity contrast, 659–660 Floating input and regulator capabilities, 63 Flyback design, 259 “Flying” sense resistor, 682 Forced continuous mode (FCM), 298 FPGAs, 145 Frequency division, 84 Fully differential driver, 713–714 Fuse detection, adding, 542 G 3G communication systems, 1065 Gain 10, compensation for, 1086 Gain trimming, in instrumentation amplifier based systems, 881–882 “Gas gauge” battery monitor, 595–596 Gated measurements of fast signals, 814 General purpose input/output (GPIO) pins, 535–536, 542 “GOSIT”, 961–962 Index H Half-bridge digitizer with zero-scale and full-scale sense, 737 Hall sensor amplifier, 911–912 Harmonic distortion, 894 H-bridge power-transistor topology, 983 measuring load current in, 983–984 simple solution, 983–984 H-bridge problem solving, 682 Hewlett-Packard HP-4195A network, 657 Hex level shift shrinks board space, 23 High accuracy oxygen sensor, 904 High definition multimedia interface (HDMI), 687 LTC4300A-1 bus buffer, 687–688 LTC4300A-3 level shifting buffer, 688 High dynamic range bandpass filters, 1023 design, 1023 test results, 1023–1024 High efficiency 3.3V regulator, 21 High efficiency 36V–72V to 2.5V/6A power supply, 678 High efficiency dual 8.5V/3.3V output step-down converter, 89–90 High efficiency ThinSOT white LED driver, 641 dimming control, 642 Li-Ion-powered driver, 641–642 High efficiency white LED driver, 647 dimming control, 648 Li-Ion LED driver, 647–648 High frequency active antialiasing filters, 1003 antialiasing 10MHz filters, 1004 LT6600-10 lowpass filter, 1003 LT1819-based RC lowpass filter, 1003–1004 High frequency amplifier evaluation board See Demo board DC009 High linearity components, 1073 adding free gain to the system, 1074 basic receiver design, 1074 choosing right components for the job, 1073–1074 selective filter, 1074 High performance DC-to-DC converter, 236 High performance op amps, 915 High power boost converters, 673 High power CCFL backlight inverter, 653–654 High power LEDs, 607, 627–629 boost circuit, 628 buck-boost circuit, 628 driven by monolithic converter, 633 boost driver, 633–634 buck driver, 634 buck-boost driver, 634 LED dimming, 628 LTC3783, 627–628 protection, 628 High power supply rejection ratio (PSRR), 752 High power white LEDs, 632 High resolution video solutions economical SXGA/HD cable driver, 686 input-port multiplexer, 686 single-supply cable driver, 686 using single 5V power, 685–686 High side current sense amplifier, 931–932 High speed ADC driving, 1079–1080 High speed differential SCSI, 835 High speed layout techniques, 957 High voltage buck converters dual buck 1.5A LED driver, 630 high-powered LEDs, 629 single buck 1A LED driver, 629–630 High-bit-rate Digital Subscriber Line (HDSL), 766 Hot Swap and buffer I2C buses, 551–552 system clock (SCL) line, 551 system data (SDA), 551 Hot Swap circuit InfiniBand specification, 549–550 Hot Swap controller, 529, 535, 545, 547, 555, 563–564 application, 555–556 automatic restart, 556 monitoring power through, 541–542 Human Body Model, 847 HVIN voltage, 670 Hysteresis, 996 I I/O power generation, high efficiency, 33 I2C fan control, 601–602 additional features, 602 continuous system cooling and tachometer monitoring, 602 I2C interface, 664, 675 I2C-controllable regulators, 105 IBM PCs, 799 compatibles, 799 IC instrumentation amplifiers, 885–886 IEEE802.3af Power over Ethernet (PoE) standard, 575, 578 disconnect detection, 576 LTC4259A options, 576 PSE’s duties, 575–576 supplying 3.3V from −48V, 576 IEEE1394 High Performance Serial Bus (“FireWire”), 829–830 IF amplifier, 837 IF receiver chain, 718 Independent adjustable current limit, 84 Independent synchronization, 84 Indicator, and RGB function select button control for cell phone backlight, vibrator motor and sound, 624 Inductor DCR auto-calibration, Inductor selection for switching regulators, 69 InfiniBand specification, 549–550 Infrared Data Association (IrDA) FIR, 1090 4ppm, 1090 SIR, 1090 Input common mode voltage (VINCM), 910 Input current sensing, Input noise reduction, 486 Input voltage lockout and sequencing, 108 Inrush limiting, 548 Instrumentation amplifier (IA), 969–970 Instrumentation amplifier based systems gain trimming in, 881–882 Instrumentation amplifiers, 875 Intel Mobile CPUs, 30 Intel Mobile Voltage Positioning (IMVP), 30 Intel Pentium III processors, 187 Interface standards, review of, 833 Intermediate frequency (IF) receiver performance, 1061 Intermodulation distortion (IMD), 1080 Inverting charge pump, 343 Inverting DC/DC controller, 73 ISDN services, 839 Isolated excitation supply (24V), 722 ITEMP pins, 92 J JFET, 913 K Kelvin sensing, 307–308 Kirchoff ’s Voltage Law, 228 L Large area photodiode amplifiers, 905–906 Large TFT-LCD displays, 625–626 LCD (liquid crystal display), 653 backlight measurement current calibrator, 658 current probe circuitry, 657–658 bias generators, 283–284 LEDs brightness, 630 brightness control, 652 dimming, 628, 648 driver, 607–608, 613 driver design, 607 driving from 12VAC input, 631–632 thermal regulation, 632 LF156-LF356, 962 Li-Ion batteries, 191, 417–418, 447 Li-Ion battery charger, solar-powered, 478 Li-Ion battery systems, 419 Li-Ion LED driver for white LEDs, 647–648 Li-Ion powered driver for white LEDs, 643–644 Li-Ion/polymer batteries, charging, 669–670 Li-Ion-powered driver for white LEDs, 641–642 Linear phase lowpass filters, 1011 Linear variable differential transformers (LVDTs), 1049 circuit calibration, 1050 circuit description, 1050 operation, 1050 Linear voltage regulators, 365 Linearized platinum RTD bridge, 886 Linear-phase communication filter, 1020 Liquid crystal display (LCD), 311, 649, 659 24V boost converter, 312 Lithium-ion (Li-Ion) batteries, 451 Lithium-ion battery charger, 456, 469–470 Lithium-ion cell, 455 “Load-feedforward” signal, 271–272 Local Area Networks, 505 Logging photodiode amplifier, 940 Long-term drift, lies about, 995–996 Loop compensation, 42 Lossy displays, 660 Low cost 50MHz voltage controlled amplifier, 705 Low distortion, achieving, 925–926 Low distortion HDSL line driver, 1088 Low dropout (LDO) voltage regulators, 145–146, 317 Low input voltage CCFL power supply, 655–656 Low noise, low distortion, 16-bit, 1Msps SAR ADC, 16, 715 fully differential drive, 715 PCB layout, 715–716 single-ended to differential converter, 715 Low noise, low power photodiode amplifier, 913–914 Low noise amplifiers, 905 for large area photodiodes, 905–906 for small area photodiodes, 905 Low power elliptic antialiasing filter, 1019–1020 Low ripple high frequency operation, 107–108 Lowpass filters, 1009 LTC1563 approach, 1009–1010 LT10XX, 974 LT1004, 65 LT1006, 40, 944, 970 LT1006 or the LT1077, 970 LT1006//LT1013/LT1014, 955–956 LT1007, 963–964 LT1007 precision bipolar op amp, 965–966 LT1009, 886 LT1012, 956, 967 macromodel, 967–968 LT1012A, 970 1095 Index LT1012A op amp, 970 LT1013//LT1014 model, 975–976 LT1021, 809 LT1021-5, 805 LT1024, 968 LT1025, 877–878 LT1027, 881, 884 LT1028, 937, 963–964, 977 LT1034, 971 LT1037, 963–964 LT1056, 961–962 LT1070, 67, 69, 508 LT1071, 507–508 LT1072, 65, 338, 505, 508, 862 circuit design, 505–506 transformer design, 506 LT1073, 337 LT1074, 293, 339 circuit description, 293, 339 LT1076, 231, 235 capacitors, 231–232, 235–236 heat sinking, 232, 236 inductor, 231 inductors, 235 layout, 232, 236 output adjustment, 236 performance, 231 LT1077, 972 LT1077//LT1078/LT1079, 955–956 LT1080, 868 LT1080//LT1081, 865–866 LT1081, 868 LT1083, 363–364 LT1084, 360 LT1085, 359 LT1097, 881 LT1097CN8, 964 LT1101, 885 instrumentation amplifier, 881 micropower instrumentation amplifier, 956 LT1109, 291 LT1111, 49 LT1115, 963–964 LT1118, 351–352, 358, 466 LT1118-2.5, 357–358, 466 LT1118-2.85, 358 LT1118-5, 358 LT1120, 289 LT1121, 224 LT1123, 361 LT1124, 948 LT1129-3.3, 47–48 LT1130, 862, 865 LT1158, 398 LT1167, 929 ADC signal conditioning, 930 current source, 930 gain, 929 input protection, 929–930 low input bias current and noise voltage, 929 LT1169, 937–938, 948 LT1171, 839 LT1172, 61–62 LT1173, 289–290 LT1175, 465 LT1178 op amp, 971–972 LT1180 RS232 transceiver, 859–860 LT1180/81 RS232 transceivers, 857–858 LT1180//LT1181, 861 LT1182//LT1183/LT1184F/ LT1184, 659–660 1096 LT1182 floating CCFL configuration, 659 LT1190, 701–702, 705, 953–954, 957 LT1191, 957 LT1192, 957 LT1193, 701–702, 705–706 LT1204 four-input video multiplexer IC, 699–700 LT1206, 941, 950 LT1207, 941–942 LT1210 CFA, 941–942 LT1220 families, 957 LT1223, 957, 959 LT1223 and LT1227, 703 LT1228 A3, 951–952 LT1228 A4, 951–952 LT1236, 995 LT1237, 851 ESD protection techniques, 851–852 interfacing with 3V logic, 851 PC board layout, 852 LT1241, 397 low cost high efficiency, high power density DC/DC converter, 397–398 synchronous switching, 398 LT1254, 697 LT1256 cable equalizer, 695–696 LT1259, 697 LT1269, 839–840 LT1270, 286, 473–474 LT1303, 333–334 LT1304, 467–468 2-cell to 5V converter, 467–468 super Burst Mode operation, 468 LT1307, 287 455kHz noise considerations, 288 single-cell boost converter, 287–288 LT1308, 277 2-cell digital-camera supply, 278 single Li-Ion cell, 277–278 LT1316, 283 2-cell, low profile LCD bias generator fits in small places, 283–284 supercapacitor-powered backup supply, 284 LT1328, 1089 functional description, 1089–1090 IrDA FIR, 1090 IrDA SIR, 1090 4ppm, 1090 LT1330, 50 LT1331, 50 LT1332, 850 LT1339, 205 distributed power, 205–206 higher input voltages, 206 LT1342, 849 LT1351//LT1352/LT1353 family, 935 buffering data acquisition systems, 935–936 filters, 936 two op amp instrumentation amplifier, 936 LT1354–LT1363, 938 LT1355, 948 LT1360, 944 LT1366, 945–946 LT1367, 946 LT1370, 275 5V SEPIC converter, 276 5V to 12V boost converter, 275–276 circuit description, 275 positive to negative converter, 276 LT1371, 654 LT1372, 57, 333–334 LT1373, 58, 335 dual output converter, 336 3.3V SEPIC converter, 335–336 LT1374, 201 dual output SEPIC converter, 202 high efficiency, 201–202 SO-8 packaged, 202 LT1376, 217 output ripple voltage, 218 regulation performance and efficiency, 217–218 LT1377, 58, 336 LT1394, 1035 × NTSC subcarrier tunable crystal oscillator, 1035– 1036 high speed adaptive trigger circuit, 1036 LT1395//LT1396/LT1397, 901 LT1425, 503 LT1431, 365 LT1460, 997 higher performance, industrial temperature range and surface mount, 998 longer battery life with precision, 997 small package, 997–998 LT1461, 995–996 LT1462/3/4/5, 939 applications, 939–940 driving large capacitive loads, 939 LT1466L, 931 high side current sense amplifier, 931–932 picoampere input current instrumentation amplifier, 932 3.3V, 1kHz, 4th order Butterworth filter, 932 variable current source, 931 LT1467L quad, 931–932 LT1469, 712 LT1490A, 331 LT1491, 1091–1092 LT1495, 933–934 LT1497, 1087–1088 HDSL line driver, 1088 performance, 1088 LT1505, 447–448 LT1510, 463, 469 battery charger IC, 449–450 board layout and testing, 450 LT1511, 456, 463 LT1511 battery charger, higher duty cycle for, 461 LT1511 battery charger IC, 453–454 LT1513, 655–656 LT1521, 465 LT1521-5, 466 LT1533, 281–282 circuitry details, 282 performance characteristics, 282 LT1534, 279 additional features, 280 low noise bipolar supply, 280 low noise boost regulator, 279–280 LT1567, 1005 differential buffer/driver, 1006 differential to single-ended amplifier, 1006 free design software, 1006 single-ended to differential amplifier, 1005–1006 LT1568, 1001, 1075–1076 application examples, 1002 device description, 1001–1002 4th order bandpass filter, 1002 4th order elliptic lowpass filter, 1002 LT1573, 347 LT1575, 348, 353 LT1577, 353 LT1579, 457 LT1580, 347–348, 355–356 -based circuit, 39–40 circuit example, 356 features of, 355–356 LT1585, 21–22, 45–46 LT1587-based circuit, 39 LT1613, 348 LT1615, 311, 651–652 LT1615-1, 311 1-cell alkaline to 3V boost converter using, 312 LT1616, 161–162 LT1617, 311 LT1617-1, 311 LT1618, 269, 639–640 Li-Ion white LED driver, 270 LXHL-BWO2 white LED, 640 LXHL-PW09 white LED, 640 USB to 12V boost converter, 269 USB to 5V SEPIC DC/DC converter, 269–270 LT1618EDD, 639 LT1619, 267 automotive supply, 268 choosing the MOSFET, 268 3.3V to 5V converters, 267–268 LT1634A reference, 934 LT1641 Hot Swap controller, 555–556 automatic restart, 556 LT1675, 693–694 LT1676, 179–180, 189, 830 LT1677, 927–928 LT1681, 395 isolated 48V to 3.3V supply, 395 LT1711, 1033 LT1714, 1033 LT1720 comparators, 1050 LT1722, LT1723 and LT1724 low noise amplifiers, 915–916 LT1725, 501 circuit description, 501–502 circuit operation, 502 LT1725 switching regulator controller, 577–578 LT1761, 349 applying the regulators, 349 noise performance, 349–350 LT1761-5, 132 LT1766, 155–156, 159 efficiency, 159–160 output ripple voltage, 160 peak switch current, 160 LT1768, 649 Index dual CCFL backlight inverter, 649–650 fault modes, 650 features, 650 multimode dimming, 650 LT1776, 189, 829–830 LT1777, 179–180 LT1782/LT1783 op amps, 1013–1014 LT1783, 530 LT1785 and LT1791 RS485/ RS422 transceivers, 825–826 LT1787 high side current sense amplifier, 987 operation with an A/D converter, 987–988 LT1789-10, 875–876 LT1790, 995 LT1790-1.25, 911 LT1793, 924 LT1800 amplifier, 919 low power amplifier with 250V output swing, 920 single supply 1A laser driver, 919–920 LT1801 dual, 919 LT1802, 919 LT1806, 923–926 LT1806 op amp, 1034 LT1807, 1050 LT1809, 925 rail-to-rail pulse width modulator using, 926 LT1819-based RC lowpass filter, 1003–1004 LT1880, applications of getting rail-to-rail operation without rail-to-rail inputs, 921–922 platinum RTD, single-supply current source for, 922 precision photodiode amplifier, 922 LT1884, 927–928 LT1886, 1085–1086 frequency response, 1086 LT1930, 273 ±15V dual output converter with output disconnect, 274 5V local supply, 273–274 12V local supply, 274 LT1930A, 1083–1084 LT1932, 647 dimming control, 648 Li-Ion LED driver, 647–648 LT1933, 131 negative output from a buck regulator, 132 LT1936, 131 producing a lower output voltage from, 131–132 small size and versatility, 131 typical application for, 131 LT1937, 643 easy dimming control, 644 Li-Ion powered driver for, 643–644 LT1940, 261 circuit description, 261–262 high frequency, current mode switching minimizes component size, 262 2-phase switching eases EMI concerns, 262 soft-start and power good pins simplify supply sequencing, 262 LT1943, 635–636 LT1952, flexible circuit, 10 synchronous forward converter based on, 10 LT1956, 143–144 LT1961, 259–260 LT1970, 917–918 boosted output current with “snap-back” current limiting, 918 LT1983-3, 685 LT1991, 773, 985 battery monitor circuit, 986 easy to use, 986 op amp, 985–986 resistors, 985 LT1993-2, 1079–1080 LT1993-x, 1079 features, 1079 LT3010, 345–346 versatile and rugged regulator, 346 LT3092, 521–522 LT3420, 645 features, 645–646 interfacing to microcontroller, 646 LT3430, 149, 155–156 efficiency, 149–150 efficiency vs load current, 149 peak switch current, 150 small size, low output ripple voltage, 150 LT3431, 143–144 LT3433, 329 4V–60V input to 5V output DC/DC automotive converter, 329–330 8V–60V input to 12V output DC/DC converter, 330 LT3434, 135 Burst Mode operation, 136 low dropout, 136 power good, 136 soft-start, 136 LT3437, 679–680 LT3439, circuit description, 55–56 LT3463, 251 CCD sensor bias supply, 252 dual output converter, 252 dual output ±20V converter, 251–252 LT3464, 253–254 16V bias supply, 253–254 ±20V bias supply, 254 34V bias supply, 254 20V bias supply with variable output voltage, 254 LT3465 white LED driver, 641 dimming control, 642 Li-Ion-powered driver for, 641–642 LT3467, 249 LT3468-1, 637–638 LT3470, 129 current mode control, 129–130 design flexibility with integrated boost diode, 130 LT3471, features, 53 LT3474, 629–632 LT3475, 629–630 LT3477, 633 boost driver, 633–634 buck driver, 634 buck-boost driver, 634 LT3481, 121 additional features of, 122 low ripple and high efficiency solution, 121–122 LT3482, 1067–1068 LT3489, 625–626 LT3493 additional features of, 122 small solution size, 122 LT3496, 617 200mA LED strings, 618 500mA LED strings, 618 3000:1 PWM dimming ratio, 617–618 surviving load dump events, 618 LT3501 dual converter features, 119–120 output supply tracking and sequencing, 120 single, low ripple 6A output, 120 LT3506, 118, 117–118 applications, 117–118 2-phase switching, 118 power sequencing without adding components, 118 LT3506A, 117–118 applications, 117–118 power sequencing without adding components, 118 LT3507, 107–108 input voltage lockout and sequencing, 108 LT3511, 495 LT3512, 495 LT3525, 398 LT3572, 243 operating Piezo motor with long wires, 244 single driver application, 243–244 using external power supply, 244 LT3573, 495 LT3574, 495 LT3575, 495 LT3580, 301 adjustable/synchronizable switching frequency, 301 boost converters, 302 Cuk converter, 302 sensing output voltage, 301 SEPIC converters, 302 soft-start and undervoltage lockout, 301–302 LT3598, 613 application, 613 channel disable capability, 614 need for current, 613–614 TSET pin for thermal protection, 614 LT3681, 113–114 frequency foldback, 114 low ripple and high efficiency solution over a wide load range, 114 small, simple solution, 113–114 LT3692A, 83–84 high input voltage with high transient capability, 83 on-die temperature monitoring, 83–84 standalone comparator block, 84 LT3710, 393 design example, 393 LT3740, 103–104 LT3750, 521–522 charge batteries, 522 charge small capacitors fast, 522 safety, size and flexibility, 521 simple strobe capacitor charger, 521–522 LT3756 high voltage LED driver, 615–616 LT3759, 317 precision UVLO and soft-start, 318 sensing output voltage made easier, 317–318 2.5V to 15V to 12V SEPIC converter, 318 1.8V to 4.5V to 5V/2A boost converter, 318 wide input voltage range with internal LDO, 317 LT3763, 607–608 LT3782, 248 LT3782A, 671–672 LT3791 synchronous buck-boost controller, 609–610 LT3799, 611–612 LT3800, 125 12V/75W synchronous buck DC/DC converter, 126 high efficiency at standby, 125–126 LT3837, 495 LT3845, 109 LT5400 common mode rejection ratio, 893–894 harmonic distortion, 894 stability, 894 LT5516, 1075–1076 LT5528, 1077–1078 LT5557, 1070 LT5575, 1073–1074 LT5578 mixer, 1063 LT5579 mixer, 1063–1064 LT6000 and LT6003 family, 903 NiMH and alkaline, 903 portable gas sensor, 904 supply friendliness, 903–904 LT6011, 911 DAC amplifier, 912 Hall sensor amplifier, 911–912 3mm × 3mm DFN package, 911 LT6100, 681 LT6105, 899 solenoid monitoring, 899–900 supply monitoring, 900 LT6108-2, 529 current-controlled delay interval, 530 extending the retry time interval, 530 higher currents permitted for shorter time intervals, 529–530 LT6202, 913 LT6203, 913–914 LT6204, 913–914 LT6205, 691–692 LT6206, 691 LT6207, 691 LT6231 amplifier, 1075–1076 LT6552, 689–690 LT6556, 685–686 1097 Index LT6557, 685–686 LT6559, 686 LT6600-10 lowpass filter, 1003 LT6650 easy output voltage programming, 993–994 shunt mode operation, 994 unipolar processing of bidirectional signals, creating virtual ground for, 994 LT6700 dual comparator, 595–596 LT8300, 493, 495 low IQ, small preload and high efficiency, 494 simple and accurate primary-side voltage sensing, 493 very small size, low component count solution, 493–494 LT8410, 241 application example, 241 compatible with high impedance batteries, 242 ultralow quiescent current boost converter with output disconnect, 241–242 LT8610, 79–80 high efficiency synchronous operation, 79 low dropout operation, 80 short-circuit robustness using small inductors, 79 wide input range operation at MHz, 80 LT8611, 80 current sense and monitoring with, 79–80 high efficiency synchronous operation, 79 low dropout operation, 80 short-circuit robustness using small inductors, 79 wide input range operation at 2MHz, 80 LT8705, 315–316 240W 48V 5A telecom power supply, 315–316 500W charger for 12S LiFePO4 battery, 316 four servo loops and wide voltage range, 316 LTC regulator controllers, 353–354 LTC RS232, 847–848 LTC201A, 797–798 LTC1043, 743–744 LTC1045, 23–24, 867 LTC1050, 744, 1027–1028 LTC1051 dual chopper op amp, 965–966 LTC1062, 1027, 1029–1030 LTC1063, 948, 1021 DC performance, 1021–1022 dynamic range, 1022 internal oscillator, 1021 LTC1064, 1023–1024 design specifications and test results, 803 implementation, 803 system considerations, 803–804 LTC1064-1, 1025 comparing with RC active filters, 1025–1026 performance, 1025–1026 1098 system considerations, 1026 test results, 1026 LTC1064-4, 1023 LTC1065, 948 LTC1069-1, 1019–1020 LTC1069-6, 1020 LTC1069-7, 1020 LTC1069-X family, 1019 LTC1090, 801–802, 809, 813–815 of data acquisition systems, 811–812 sample and hold, 813–814 series of data acquisition systems, 807 LTC1092, 805, 807–808 LTC1094, 859–860 LTC1096 and LTC1098, 769 AC and DC performance, 770 A/D conversion for 3V systems, 770 instrument size, 770 longer battery life, 769–770 LTC1100, 885 LTC1142, 223 efficiency, 223 triple output high efficiency power supply, 224 LTC1148, 22, 43, 47–48, 229, 233–234, 360 circuit particulars, 230 LTC1149, 225–226, 229, 233–234 circuit particulars, 230 construction notes, 226 customizing the circuit, 226 performance, 229 theory of operation, 229–230 LTC1150, 964 LTC1153, 286 LTC1155, 471 cost effective and efficient power system, 472 extremely low voltage drop regulator, 472 quick charge battery charger, 472 very low power dissipation, 472 LTC1157, 49 LTC1163, 411 LTC1165, 411 LTC1174, 221, 227 100% duty cycle in dropout, 228 positive-to-negative converter, 228 LTC1197/LTC1199, 745 battery current monitor, 746 flexible inputs, 746 good DC and AC specs, 746 high speed capability, 746 performance, 745–746 serial I/O, 746 smallest size (MSOP), 745 3V or 5V supplies, 745 LTC1265, 213, 219–220 100% duty cycle in dropout mode, 214 2.5mm typical height 5V-to3.3V regulator, 214 battery charger application, 220 constant off-time architecture, 214 efficiency, 213 good start-up and transient behavior, 214 high frequency operation, 213–214 LTC1266, 215 basic circuit configurations, 216 driving N-channel MOSFETs, 215–216 N-channel vs P-channel, 215 LTC1266 switching regulator, 22 LTC1273/5/6 and LTC1282, 767–768 LTC1274, 935–936 LTC1278/LTC1279 applications, 766 high speed ADC family members, 765–766 LTC1282 ADC (3V), 768 LTC1286/LTC1298, 761 resistive touchscreen interface, 762 in SO-8 package, 761–762 LTC1290, 863–864 GW BASIC, 800 IBM PC compatibles, 799 serial interface, sharing, 864 speed limitation by MPU, 864 talking to MPUs without serial ports, 864 talking to serial port MPUs, 864 LTC1298, 759 PC 2-channel analog I/O interface, 759–760 LTC1327, 849–850 LTC1344A, 833 application, 833–834 LTC1345, 846 LTC1387, 831 features, 831–832 RS232 and RS485 interfaces, 831 LTC1390, 793–794 LTC1391, 604 LTC1392, 604, 795 application, 796 measurement performance, 795–796 LTC1404, 987–988 LTC1410, 763, 944 differential inputs reject noise, 764 high accuracy conversions, 763 low power applications, 764 multiplexed applications, 763 telecommunications applications, 763–764 LTC1415, 757 benefits, 758 DSP interface, 758 exemplary AC and DC performance, 758 no latency and low bit error rate (BER), 758 reducing power with single supply operation and two power saving shutdown modes, 758 wide bandwidth CMRR, 758 complete ADC with reference and wideband S/H, 757–758 single 5V supply, high speed, lowest power, 757 tiny package, 757 LTC1418 14-bit ADC, 747 differential inputs with wideband CMRR, 748 high performance without high power, 747–748 on-chip reference, 748 parallel or serial data output, 748 single supply or dual supply operation, 748 wide dynamic range, 748 LTC1419, 753 10dB extra dynamic range for signal applications, 754 features, 753 and LTC1410, 753–754 noise rejecting differential inputs, 754 upgrading, 754 LTC1420 ADC, 733–734 LTC1421, 563 application, 565–566 board insertion timing, 566 hot swappable PCI slot using, 564 safe hot swapping using, 565 LTC1422, 562, 599 LTC1430, 41 performance features, 41–42 typical 5V to 3.3V application, 42 LTC1435, 199, 211–212, 354 external loop compensation, 199–200 high performance Pentium processor power, 212 loop compensation using a dynamic load, 200 new IC powers portable Pentium processor, 211–212 portable Pentium processor power, 212 LTC1435A, 195–196 LTC1436, 200 LTC1436-PLL, 200, 210 additional features, 210 new feature providing new EMI control, 209–210 new IC solves old problems, 209 LTC1437, 200 LTC1438, 200 LTC1439, 200 LTC1440, 837, 1037–1038 LTC1440–LTC1445 family, 1039 single cell lithium-ion battery supply, 1040 undervoltage/overvoltage detector, 1040 voltage reference, 1039–1040 LTC1441, 1038 LTC1446, 759 LTC1446/LTC1446L applications, 784 complete stand-alone performance, 783–784 low power 5V or 3V single supply, 783 rail-to-rail outputs, 784 LTC1450/LTC1450L, 785 flexibility with stand-alone performance, 785 low power, 5V or 3V single supply operation, 785 4-quadrant multiplying DAC application, 785–786 LTC1451/LTC1452/LTC1453 applications, 788 flexibility, true rail-to-rail performance and micropower, 788 true rail-to-rail output, 787–788 Index 5V and 3V operation, 787 LTC1472, 409–410 LTC1473, 459 automatic switchover between battery and AC adapter, 459–460 power routing circuit, 460 LTC1474 3.3V/10mA regulator, 204 inductor current control, 203 step-down regulator, 203–204 LTC1475 3.3V/10mA regulator, 204 inductor current control, 203 pushbutton ON/OFF operation, 204 step-down regulator, 203–204 LTC1477, 285 current-limited boost regulator, 285–286 short-circuit protection and load disconnect with, 285 short-circuit protection at higher power, 286 LTC1480 ultralow standby power RS485 transceiver, 837 LTC1481, 844 LTC1483, 844 LTC1487, 844 LTC1504, 352 LTC1514, 487 LTC1515, 487 LTC1516, 489 2-cell to 5V conversion, 489– 490 ultralow quiescent current, 490 LTC1518/LTC1519/ LTC1520, 841 applications, 842 circuit description, 841–842 features, 842 LTC1535, 823–824 LTC1538-AUX, 200, 207 LTC1539, 200 LTC1541, 455, 989 LTC1543, 833 application, 833–834 LTC1544, 833 application, 833–834 LTC1560-1, 734, 1017 DC accuracy, 1018 elliptic transfer function of, 1017–1018 frequency and time-domain response, 1017–1018 LTC1562, 1015–1016 LTC1563, 1009 Chebyshev filters with gain, 1010 easy design without sacrificing performance, 1010 lowpass filters, 1009–1010 LTC1563-3, 1011–1012 LTC1564, 1007 application example, 1008 dual power supply circuit, 1007 filtering performance and operation, 1007–1008 LTC1565-31, 1012 LTC1569-7, 1011–1012 LTC1574, 219–220 low noise regulator, 219–220 LTC1590, 781 amplified attenuator and attenuated PGA, 781–782 digitally controlled attenuator and PGA, 781 LTC1592, 777–778 LTC1594/LTC1594L/LTC1598/ LTC1598L, 755 DC performance, 756 individual ADC and MUX chip, 756 latchup proof MUX inputs, 756 MUXOUT/ADCIN, 756 power conservation with auto shutdown operation, 755–756 versatile, flexible serial I/O, 756 LTC1595/LTC1596 16-bit DACs, 879 16-bit accuracy over temperature without autocalibration, 879–880 features of, 879 precision ±10V outputs with a dual op amp, 880 precision 0V to10V outputs with one op amp, 880 ultralow 1nV-s glitch, 880 LTC1597 DAC, 779–780 LTC1604, 749 applications, 750 DC and AC performance, 749–750 differential inputs reject common mode noise, 750 LTC1605, 751 AC and DC performance, 751–752 applications, 752 circuit description, 751 features, 751 LTC1622, 185 LTC1625, 169–170 LTC1626, 197 current mode architecture, 198 duty cycle in dropout mode, 198 high efficiency 5V to 3.3V conversion, 198 PMOS switch in, 198 single-cell Li-Ion operation, 197–198 LTC1627, 191 single Li-Ion applications, 191–192 SYNC/FCB pin, 192 LTC1628, 183 LTC1628-SYNC, 13–14 design details, 13–14 LTC1629, 13, 168, 177, 181–182 design details, 177–178 design example, 182 LTC1642 InfiniBand Hot Swap circuit, 549–550 LTC1643, 559–560 application, 560 power-up sequence, 560 LTC1643L, 559 LTC1645, 546 LTC1645 Hot Swap controller, 557 basic operation, 557–558 power supply tracking and sequencing, 558 LTC1646 Hot Swap controller, 553–554 application, 553–554 power-up sequence, 554 LTC1668, 733, 915–916 LTC1685, 835 LTC1686/LTC1687, 835 LTC1694, 828 LTC1695, 17 LTC1698, 395 LTC1699, 31–32 LTC1699-80, 31–32 LTC1699EGN, 31 LTC1700, 265 2-cell input, 3.3V/1A output regulator, 3, 266 3.3V input, 5V/3A output boost regulator, 5, 265–266 LTC1702, 175–176, 187–188 LTC1703, 187–188 LTC1704, 145 circuit description, 145–146 LTC1709-7, 16 LTC1709-8/LTC1709-9, 171 design example, 172 LTC1728-1.8 triple supply monitor, 599–600 LTC1729 Li-Ion charge termination IC, 450 LTC1731, 451 LTC1731-4.2, 451 LTC1733, 437 charge cycle with thermal limit in operation, 437–438 complete standalone charger, 438 thermal feedback loop, 437 thermally enhanced package, 438 LTC1734, 445 programmable constant current source, 446 simple low cost Li-Ion charger, 445–446 LTC1735, 193 LTC1736, 20, 38 LTC1754 white LED driver, 651 LTC1760 dual smart battery charger, 431–432 power management, 432 LTC1771, 165–166, 602 LTC1773, 153–154 LTC1778, 33–34 LTC1799 resistor-programmed oscillator, 1045 fast start-up time, 1046 temperature-to-frequency converter, 1046 tiny circuit, big performance, 1045–1046 two-step design process, 1046 LTC1840, 601 LTC1851, 731–732 LTC1864, 914 LTC1871, 499 LTC1872, 444 LTC1876, 157 design example, 158 LTC1877, 165 LTC1878, 165–166 LTC1921, 597 application, 598 features, 597–598 LTC1929, 35–36, 173 design details, 173–174 test results, 174 typical application, 174 LTC1929/LTC1929-PG, 167 design example, 168 multiphase applications, 168 overcurrent limit, 168 LTC1955 dual smart card interface, 821–822 ease of use, 822 features, 822 LTC1960, 439–440 automatic crisis power management, 440 automatic current sharing, 440 faster charge times with a second battery, 440 simultaneous discharge increases run time, 440 LTC1966 RMS-to-DC converter, 1051 circuit description, 1052 flexibility of, 1053 input dynamic range, expanding, 1052 trouble with log-antilog, 1053–1054 working of, 1054 LTC1967, 1049–1050 LTC1983-5, 1052 LTC1992, 909 common mode input range extension, 910 common mode range considerations, 910 easy-to-use circuit topology, 909–910 versatile functional block, 910 LTC2050, 907 LTC2053, 877–878 LTC2054, 907 LTC2255, 1080 LTC2274, 717 LTC2299, 1074 LTC2338, 711 LTC2338-18, 711–712 LTC2351-14, 873 power line monitoring application, 873–874 LTC2360, 720 LTC2366, 719–720 LTC2379-18, 713 fully differential driver, 713–714 layout considerations, 714 single supply driver, 714 LTC2393-16, 715–716 LTC2400, 743–744 LTC2400/LTC2401/ LTC2402, 737 noise rejection, 738 pseudo-differential applications, 738 single-ended half-bridge digitizer with reference and ground sensing, 737–738 LTC2402, 735, 739, 824 bridge connection of RTDs, 736 digital cold junction compensation, 739–740 platinum RTDs, 735 pulsed excitation, 736 RTD temperature digitizer, 740 self-heating effects, 735–736 series connection of RTDs, 736 LTC2408, 741 measuring DC to daylight using, 741 LTC2414, 792 LTC2418, 791–792 1099 Index multiple measurements with, 791 noise reduction, 792 LTC2433-1, 729–730 LTC2449, 723–724 LTC2450, 721–722 LTC2484, 725–726 LTC2630/LTC2631 and LTC2640, 773 applications using REF pin, 773–774 LTC2704, 775 ease use of, 775 example circuits, 775–776 unprecedented integration, 775 LTC2912 supervisor, 583–584 LTC2913 supervisor, 583 LTC2914 supervisor, 583 LTC2923 power supply tracking controller, 593 LTC2924, 591–592 LTC2927, 589–590 LTC2928, 585–586 LTC2950, 587–588 LTC2951, 588 LTC2953, 581–582 LTC2991, 871–872 psychrometer using, 871 LTC3105, 477–478 LTC3122, 239 output disconnect, 240 start-up inrush current limiting, 240 1.8V to 5.5V input to 12V output boost regulator, 239–240 LTC3200, 485 LTC3200-5, 485 LTC3219 9-output universal LED (ULED), 623–624 LTC3225, 517–518 LTC3226, 511–512 LTC3250, 483 LTC3250-1.5, 483 LTC3251, 483–484 ultralow noise adjustable charge pump, 484 versatility, 484 LTC3260, 343–344 Burst Mode operation, 344 constant frequency mode, 343–344 dual LDOs, 344 inverting charge pump, 343 LTC3375, 663 configurable maximum output current, 663 external VCC LDO and external input power supply start-up control, 663–664 power control and features, 664 LTC3401, 271 LTC3402, 271 all-ceramic-capacitor, 271–272 high efficiency Li-Ion CCFL backlight application, 272 LTC3404 features, 163 step-down regulator, 163–164 LTC3406/LTC3406B, 151–152 1.8V/600mA step-down regulator, 152 efficiency considerations, 152 efficient Burst Mode operation, 152 fault protection, 152 1100 pulse skipping mode, 152 space saving, 151 versatile, 151–152 LTC3411, 263–264 multiple operating modes, 263–264 two 2.5V step-down converters, 264 LTC3412, 263 multiple operating modes, 263–264 two 2.5V step-down converters, 264 LTC3413, 147 LTC3414, 137–138 LTC3415, 123–124 features, 123 multiple, 124 operation, 123–124 LTC3425, 257–258 fault protection, 258 high power and high efficiency in a small package, 258 multiple operating modes, 257–258 LTC3428, 255 antiringing feature, 256 dual phase converter reduces output ripple, 255–256 smaller layout, 256 LTC3440, 331, 441 powering GSM modems from USB/PCMCIA, 331–332 5V converter in USB On-TheGo devices, 332 LTC3443 buck-boost, 574 LTC3446, 111–112 buck regulator of, 112 very low dropouts (VLDOs) in, 111–112 LTC3524, 621–622 3-output TFT supply with digitally dimmed LED backlight, 622 LTC3526L, 245–246 LTC3526LB, 245–246 LTC3530, 323 efficiency, 324 programmable Burst Mode operation, 324 LTC3539, 516 LTC3546 application examples, 96 flexible current partitioning, 96 operation modes and efficiency, 96 LTC3555, 421 complete power solution in a single IC, 422 switching PowerPath controller, 421–422 LTC3562, 105 LTC3569 buck regulators of, 97–98 power good indicator, 98 power saving operating modes, 98 programmable clock frequency, 98 LTC3577/LTC3577-1, battery, USB, wall and high voltage input sources, 7–8 battery charger, bucks, LDOs and boost/LED driver, pushbutton control, LTC3588-1, 479–480 LTC3600, 78 applications, 78 operation, 77–78 LTC3605, 93 LTC3606, 516 LTC3610, 101–102 LTC3625, 513–514 LTC3626 output/input current sensing, 76 temperature sensing, 76 LTC3630, 665–666 LTC36XX family, 102 LTC3703-5, 325 feature rich controller, 325 high efficiency 48V to 3.3V/6A power supply, 325–326 high efficiency 12V to 24V/5A synchronous step-up fan power supply, 326 LTC3704, 309–310 dual output SLIC supply with simplified feedback using, 309–310 improved battery protection using, 310 LTC3705, 392 LTC3706, 391 features, 392 PolyPhase design ups power limit, 392 related products, 392 simple isolated 3.3V, 30A forward converter, 391–392, 30, 391–392 LTC3708, 305–306 design features, 306 LTC3716 2-phase controller, 29–30 LTC3717, 11–12 design example, 12 LTC3718, 11–12 LTC3719 PolyPhase controller, 27–28 LTC3725, 391–392 LTC3726, 392 LTC3729, 88 LTC3730, 307–308 LTC3731, 307–308 LTC3732, 307–308 LTC3733, 139 LTC3770, 133–134 additional features, 134 programmable voltage margining, 134 start-up and shutdown output tracking, 134 LTC3773, 116, 115 LTC3780, 327 boost operation, protection for, 328 high efficiency 4-switch buck-boost converter, 327–328 SEPIC converter, replacing, 328 simplified topology, 328 LTC3783, 627–628 LTC3785, 321 95% efficiency, 322 high efficiency controller capabilities, 321–322 3.3V, 3A converter, 322, 322 LTC3788 converter, 667–668 LTC3789, 319 accurate output (or input) current limit, 320 features, 319 12V, 5A output from a 4V to 38V input, 5, 319–320 LTC3806, 497–498 efficiency, 498 improved load and cross regulation, 498 LTC3808, 127–128 low EMI DC/DC conversion, 128 start-up control, three choices for, 127–128 LTC3809, 127 LTC3809-1, 127 low EMI DC/DC conversion, 128 start-up control, three choices for, 127–128 LTC3810, 677–678 LTC3811, 303 dual output, 2-phase supply, 303–304 load step improvement with voltage positioning, 304 tried-and-true architecture, 304 LTC3829, 85–86 LTC3831, 11–12 LTC3832, 141 design examples, 141–142 LTC3838, 297 detect transient feature further speeds up transient response, 298 1.5V/25A and 1.2V/25A buck converter, 298 LTC3855, 91 LTC3856, 87 active voltage positioning, 88 inductor DCR sensing temperature compensation, 88 output voltage remote sensing, 88 Stage Shedding mode, 88 LTC3862, 673–674 LTC3863, 73–74 LTC3876, 299 load-release transient detection, 299–300 VTT reference (VTTR), 300 VTT supply, 300 LTC3883, 1.8V/30A single phase digital power supply with IIN sense, 5–6 inductor DCR auto-calibration, input current sensing, LTpowerPlay GUI, LTC3890, 81–82, 89 dual output application, 90 features, 89–90 single output application, 90 LTC3891, 81–82 LTC4001, 427–428 advanced features and functions, 428 flexible options, 428 small PCB footprint, 427–428 LTC4010, 429 standalone charge termination, 430 LTC4011, 429 4-cell NiMH battery charger, 430 standalone charge termination, 430 Index LTC4053, 435 LTC4055, 433, 574 benefits of, 433–434 implementation, 434 operation with no wall adapter, but USB available, 434 operation with wall adapter present, 434 unplugged operation, 434 LTC4059A, 408 LTC4071, 478 LTC4088, 423 charging, 424 easing thermal constraints, 424 reducing USB charge time, 424 LTC4089, 425–426 LTC4089-5, 425 LTC4098 USB power manager/ Li-Ion battery charger, 669–670 LTC4099, 417–418 battery conditioner, 418 conditions affecting aging process, 418 underlying aging process in Li-Ion batteries, 417–418 LTC4151, 675 for automotive power monitoring, 675 for telecom power monitoring with PoE, 675–676 LTC4155, 415–416 input multiplexer, 415–416 OTG operation, 416 LTC4156, 415–416 input multiplexer, 415–416 OTG operation, 416 LTC4211, 547–548 LTC4213, 537 accurate ECB with sense resistor, 538 electronic circuit breaker (ECB) application, 537–538 with sense resistor, 538 flexible overcurrent setting, 537 overvoltage protection (OVP), 537 LTC4215-1, 535 LTC4217, 529 adjustable current limit, 530 features, 529–530 integrated MOSFET and sense resistor, 530 typical application, 530 voltage and current monitoring, 530 LTC4223, 531 advanced mezzanine card application, 532 LTC4223-1, 531 LTC4223-2, 531 LTC4252A, 541 circuit solutions, 541–542 computing energy, 542 energy storage, 542 power requirements, 541 Zero Volt Transient, 542 LTC4259A, 576 LTC4260, 541–542 LTC4261, 539 circuit solutions, 539 LTC4263, 675–676 LTC4263-1, 572 LTC4267, 574 LTC4268-1, 571–572 LTC4300A-1 bus buffer, 687–688 LTC4300A-3 level shifting buffer, 688 LTC4302, 819 live insertion and removal and capacitance buffering application, 819–820 in nested addressing and 5V to 3.3V level translator application, 820 LTC4354, 401, 405 fault output detects damaged MOSFETs and fuses, 406 misconnections, types of, 401–402 ORing diode, 405–406 positive low voltage ideal diodes, 406 LTC4355, 401 misconnections, types of, 401–402 LTC4365, 524 accurate and fast overvoltage and undervoltage protection, 527 novel reverse supply protection, 527 undervoltage, overvoltage and reverse-supply protection, 527 LTC4410 USB power manager, 436 LTC4411, 574 LTC4412, 403, 517 automatic power switching between two power sources, 403–404 load sharing, 404 LTC4413, 407 automatic switchover, 408 triple supply power management, 407–408 LTC4416, 516 LTC4425, 515 LTC485 line length vs data rate, 854 propagation delay, 854 proprietary output stage, 853–854 LTC5532, 1082 LTC5567, 1057 impedance match design, 1058 LTC6090, 891 accurate 50.00V reference, 892 simple large-signal buffer, 892 solving high voltage sensing problems, 891–892 LTC6101, 681–682 LTC6102, 981–982 LTC6103, 984 LTC6104, 984 LTC6241, 724 LTC6244, 905–906 LTC6400-26 amplifier, 1070 LTC6401-8, 1074 LTC6406, 895–896, 1073–1074 LTC6412 VGA, 1061–1062 LTC6601-x lowpass filter, 1065–1066 LTC6602 dual bandpass filter, 1071 for RFID reader, 1071–1072 LTC6605-x, dual, matched, lowpass filter, 1066 LTC6800, 875–876 LTC6802, 419 LTC6900, 1043, 1052 output frequency, programming, 1043–1044 LTC6910-2, 1052 LTC6957, 1059 LTC6957-3, 1059–1060 LTC6994-2, 530 LTM4600, 387 design, 387–388 fast transient response, 388 μModule regulator, 387–388 thermally enhanced packaging, 388 LTM4601, 385 frequency synchronization, 386 4-output DC/DC converter power system, 385–386 output tracking, 386 LTM4605, 381 excellent thermal performance, 382 high efficiency, 381 low profile solution, 381 smooth transition and circuit simplicity, 381–382 LTM4607, 381 excellent thermal performance, 382 high efficiency, 381 low profile solution, 381 smooth transition and circuit simplicity, 381–382 LTM4608, 383 current sharing, 384 fault conditions, 384 features, 383–384 μModule regulator, 383 output voltage tracking, 384 quick and easy design, 384 thermally enhanced packaging, 384 LTM4611, 373–374 LTM4615, 377 dual switching 4A and 1.5A VLDO regulators, 377 multiple low noise outputs, 377–378 output voltage tracking, 378 thermally enhanced packaging, 378 LTM4616, 379–380, 517 parallel operation for increased output current, 380 simple and efficient, 379–380 two independent 8A regulator systems in a single package, 379 LTM4619, 375–376 dual system-in-a-package regulator, 375–376 multiphase operation for four or more outputs, 376 thermal performance, 376 LTM4676, 369–370 LTM8028, 371–372 DC1738A highlighting capabilities of, 372 integrated switching and linear regulators, 371 noise test comparison using LTC2185 ADC, 372 PCB trace voltage compensation using SENSEP, 371 programmable output voltage, 371–372 LTM8040 rich feature set, 619–620 superior LED driver, 619 user-friendly, 619 LTpowerPlay GUI, LXHL-BWO2 white LED, 640 LXHL-PW09 white LED, 640 M Magnetics Kool-Mu material, 397 MAX feedback loop, 41–42 Maximum power point control (MPPC), 477 Maximum power point tracking (MPPT), 80, 608 Medium LCD LED backlights, cost and complexity of, 613–614 Megaohm input impedance difference amplifier, 972 Micro Telecommunication Computing Architecture (MicroTCA) specification, 531 Microamp quiescent current, achieving, 67 Microcontroller ADC, upgrading, 719 application circuits, 719–720 Micropower 12-bit ADCs, 761 Micropower ADCs, 769 in small packages, 755 Micropower comparators, 1037 current consumption during switching, 1037 LTC1440 series, 1037–1038 Micropower MSOP 10-bit ADC, 745 Micropower oxygen sensor, 904 Micropower thermostat/ temperature alarm, 596 Micropower V-F converter, 797–798 Microprocessors (MPUs), 863 core supply voltage, 31 MicroSim, 976 MIN loop, 41–42 Mini Card circuit, 546 MJE1123 transistor, 361–362 MMBT3904, 871 MODE pin, 343 MODE/PLLIN pin, 320 MODE/SYNC pin, 304 μModule buck-boost regulators, 381 MODULE DETECT pin, 153–154 μModule LED driver, 619 μModule regulator, 383 Monitor system temperature, 603 multitude of measurements, 604 Monolithic converter, 633 boost driver, 633–634 buck driver, 634 buck-boost driver, 634 DC/DC converters, 57 Monolithic filters, 8th order, 1019, 1019 Monolithic step-down converters, 149–150 Monolithic step-down regulator brutal input transients, 679–680 low quiescent currents, 680 1101 Index LT3437, 679 soft-start capability, 680 Monolithic switched-capacitor lowpass filters, 1027 Monolithic synchronous step-down regulator, 101 paralleling regulators, 102 typical application example, 101–102 MOSFETs, 15, 570, 599 MPUs, 815 speed limitation by, 816 talking to, without serial ports, 816 talking to serial port, 816 MS8 packages, LT1328 in, 1089 MSOP package, 547, 985 MTB50N06EL, 360 MTP50N05EL MOSFET, 365–366 Multimode dimming, 650 Multiple output range 16-bit DAC design, 777–778 new, easy way, 778 old way, 778 Multiple power supplies track, 599–600 Multiple supply voltages and currents, 604 Multiplex amplifiers, 703–704 MUXOUT/ADCIN, 756 N N-channel logic level MOSFET, 538 N-channel MOSFET, 527 applications, 538 N-channel vs P-channel, 215 Negative supply tracking, 590 NiCads, 473 NiCd battery charger, 220 NiCd/NiMH battery charging, 429–430 Nickel cadmium (NiCd), 429 Nickel metal hydride (NiMH), 429 NiMH battery charger, 430 NOISE, operating, 973–974 Noise analysis, 908 Noise calculations, in op amp circuits, 973–974 Noise figure (NF) to signalto-noise ratio, 1069–1070 Noise measurements, 966 Notch filter, 1015 NTSC subcarrier tunable crystal oscillator, 1035–1036 O Offline LED lighting, 611 CTRL pins and analog dimming, 612 high power factor, low harmonics, 612 No-Opto operation, 611–612 open- and shorted-LED protection, 612 TRIAC dimmer compatibility, 612 Omega’s 44200 series linear thermistor kits, 522 Op amp noise model, 907 1102 Op amp selection guide, 907 best op amps, selecting, 908 noise sources, summing, 908 resistor thermal noise and op amp noise, quantifying, 907–908 Op amp SPICE macromodel, 975–976 Op amp U1, 40 OP27, 948 Open- and shorted-LED protection, 612 Open-architecture ring-tone generator, 1091 Operational amplifier selection guide, 937–938 for optimum noise performance, 977–978 Operational filter blocks, 1015 OPTI-LOOP architecture, 38 OPTI-LOOP compensation, 147–148, 185, 193, 271 Optimum noise performance, selection of op amps for, 937–938 Organic LED (OLED) panels, 253 ORing diode, 405–406 OS-CON capacitors, 59 OUTA pin, 243–244 OUTB pin, 243–244 Output boost converter at 8.5A (24V), 671–672 Output common mode voltage (VOCM), 910 2-output power supplies block diagram of, 13 schematic diagram of, 14 Overcurrent fault (OCF), 18 Overcurrent protection, 537 Overloads, adaptive response to, 548 Overvoltage protection (OVP), 415–416, 537 P P54C Pentium processor, 353 P55C Pentium processor, 353 P55C upgrade processor, 39 Pan/tilt/zoom (PTZ), 569 Parallel composite amplifier, 925–926 PC 2-channel analog I/O interface, 759–760 PC data acquisition cards, 766 P-channel JFET input op amps, 961 P-channel MOSFET, 234, 524, 1063 PCI Express, 545 circuit solutions, 546 MiniCard, 546 power requirements, 545–546 PCMCIA socket voltage switching, 409 PE-65342, 506 Peak detectors, 953 detecting pulses, 954 detecting sinewaves, 953–954 Pentium III microprocessors, 33 Pentium processor-based motherboards, 39 Pentium processors, 45 high efficiency power sources for, 43 circuit operation, 44 selection of input source, 43–44 transient response considerations, 44 Peripheral Component Interconnect (PCI) bus, 563 hot swappable PCI slot using LTC1421, 564 inrush current and data bus problems, 564 system timing, 564 Personal Computer Memory Card International Association (PCMCIA), 411 PGOOD pin, 244, 271 PGOOD signal, 116 2-phase power supply, 29–30 3-phase power supply, 86 Phase-locked loop lowpass filter (PLL LPF) pin, 210 Phase-locked loops (PLLs), 87–88, 1059 PHASEMODE pin, 304 PHMODE pin, 380 Photoflash capacitor charger, 645 features, 645–646 interfacing to microcontroller, 646 Photoflash capacitor charging circuit (320V), 645 Picoampere input current instrumentation amplifier, 932 Piezo motor, 244 Piezoelectric transducer application, 480 Pilot light flame detector with low-battery lockout, 989–990 Platinum RTDs (resistance temperature detectors), 735, 883 single-supply current source for, 922 Platinum temperature transducers, signal conditioning for, 883–884 PMOS switch in LTC1626, 198 PoE Powered Devices (PDs), 573–574 131072-point FFT, 712 Point-of-load (POL) conversion, 95 DC/DC power supplies, 383 solution, 373 PolyPhase architecture, 36 PolyPhase surface mount power supply, 35–36 Portable computers, DC/DC converters for, 337 Portable gas sensor, 904 Portable reference, 934 Positive-to-negative voltage converter, 109 basic operation, 109–110 circuit description, 110 component stress in, 110 POTS (plain old telephone system), 309–310 Power conservation with auto shutdown operation, 755–756 Power good output pin (PGOOD), 320 Power good output voltage monitor (PGOOD), 102 Power good timer (PGT), 592 Power loss curves for 1-step regulator, 38 Power monitor for automotive power monitoring, 675 for telecom power monitoring with PoE, 675–676 Power operational amplifiers, 917 boosted output current with “snap-back” current limiting, 918 LT1970, 917–918 Power over Ethernet (PoE), 569, 571, 573–574, 577–578 2-pair vs 4-pair PD, 572 applications, 497 circuit, 574 high efficiency, triple output, high power PD, 572 PD interface controller, 571–572 Power Sourcing Equipment (PSE), 572 synchronous flyback controller, 572 Power routing circuit, 460 Power saving operating modes, 105–106 Power sink peripherals, 155 Power Sourcing Equipment (PSE), 573–574 and auxiliary supplies, 572 Power supplies, 597 2-phase, 29–30 isolation controller, 553 monitor, 24 sequencing, 585, 591–592 LTC2928 configuration software, 586 power management cycle, 585–586 for subscriber line interface circuit descriptions, 839–840 layout and thermal considerations, 840 tracker, 593–594 Power system management (PSM), 370 Powered Device (PD) interface controller, 571–572 high efficiency, triple output, high power PD, 572 2-pair vs 4-pair, 572 PowerPath controller, 423–424, 439 PowerPath System, 424 Precision, matched, baseband filter ICs, 1065 Precision “clip-on” current probe for CCFL measurements, 657 Precision 16-bit DACs, op amps for, 779, 780 “Precision High Voltage IA”, 969 Precision low dropout regulator, 945–946 Precision measurement, simplifying, 723–724 Precision micropower voltage doubler, 798 Precision photodiode amplifier, 922 Precision receiver delay, 841 Precision Zener diode, 994 Index Prefabricated power modules, Probability distribution function (PDF), 418 Programmable gain amplifier (PGA) attenuated, 781–782 digitally controlled attenuator and, 781 Programming pin (PROG), 446 Programming pulse generators for flash memories, 65 Psychrometer, 871–872 Pulse width modulated (PWM) signal, 270 Pulses, detecting, 954 Pulse-width-modulation (PWM) techniques, 983 Pushbutton on/off controller, 587 challenges, 581–582 controlled power down, 588 debounces turn-on, 587 failsafe features, 582 with failsafe voltage monitoring, 581 high voltage, micropower, 588 operation without μP, 588 orderly power on, 582 protection against faults at power up, 587–588 short interrupt pulse, 582 PWM LED dimming, 608 Q Quad op amp and telephone ringtone generation, 1091–1092 Quad output switching converter, 635–636 4-output supply with soft-start, 636 power supply with 4.5V to 8V input voltage range, 635 wide input range supply, 636 QuickSwitch bus switch, 563–564 R R6-C2 time constant, 67 Radio frequency identification (RFID) reader, 1071 adaptable baseband filter for, 1071–1072 Radio Frequency Identification (RFID) receiver, 1075 direct conversion receiver, 1075–1076 low noise differential to singleended amplifier, 1076 matched I and Q filter and dual ADC, 1076 Rail-to-rail amplifier, applications of, 945 buffering A/D converters, 946 precision low dropout regulator, 945–946 single supply, 1kHz, 4th order Butterworth filter, 1, 946 Rail-to-rail amplifiers, 927, 931 Rail-to-rail inputs and outputs, 1033 Rail-to-rail pulse width modulator using LT1809, 926 Random noise generator, 951 Recovery from faults, 548 Redundant arrays of independent disks (RAID) systems, 513 Redundant power, 541 REF pin, 773–774 Reference input circuit, 1059–1060 Reference input circuit for RF system, 1059 design implementation, 1059–1060 design requirements, 1059 performance, 1060 Regulator efficiency considerations, 38 Regulator operation, 487–488 Relative humidity, measuring See Psychrometer Remote 2-wire Geophone preamp, 927–928 Remote temperature sensor (RTD) temperature digitizer, 740 Resistor thermal noise and op amp noise, quantifying, 907–908 RF power detectors, application of, 1082 RFID (Radio Frequency Identification), 1082 RF-to-digital receivers, signal chain noise analysis for, 1069 IF/baseband components, 1069 NF to SNR, 1069–1070 SNR to NF, 1070 RGB LED, 623–624 RMS voltage detection, 1051–1052 RS232 and RS485 interfaces, 831 RS232 driver/receiver (5V), 868 RS232 interface circuits for 3.3V systems ESD protection, 850 VPP switcher, 850 RS-232 interfaces, design considerations for fault conditions, 862 isolated transceiver, 862 load driving, 861–862 power supply generators, 861 RS232 interfaces, new developments in, 867–868 RS232 interfacing circuitry, 50 RS232 receiver, 24 RS232 transceivers operation with +5V and +12V supplies, 866 power supply tricks, 865–866 RS485 interface standard, 823 RS485 transceivers extending protection beyond ±60V, 826 LTC1481, 843 LTC1483, 844 LTC1487, 844 reducing power and EMI, 844 sustaining ±60V faults, 825–826 transmission over long distances, 835–836 RS562 interface circuit, 850 RUN/SS capacitor, 194 S Safe hot swapping using LTC1421, 565 application, 565–566 board insertion timing, 566 Schottky diode, 219 peak detector, 953–954 SCSI-2 bus, 855–856 active terminators, 856 global view of, 855 passive terminators, 856 Secondary Select (SS), 457 Seebeck transducer application, 480 Self-biased, buffered reference, 971–972 megaohm input impedance difference amplifier, 972 SENSE pin, 203–204, 548 SENSEN pin, 537 SENSEP pin, 371, 537 Sensing output voltage, 301 SEPIC (single ended primary inductance converter) capacitor, 268 converter, 250, 302, 328, 443 design, 259–260 LED driver, 634 topology, 278, 334–336 Series resonant crystal oscillator, 1034 Setra model 270, 721 SHDN pin, 244, 271, 302, 345, 489–490 SHDNA pin, 243–244 SHDNB pin, 243–244 Signal-to-noise plus distortion ratio (SINAD), 763–764 Signal-to-noise ratio (SNR) to noise figure, 1070 Silicon sensors, 812 Simple battery circuit, 573–574 high transient load or continuous current load operation, 574 optimization options, 574 PoE circuit, 574 PowerPath and charger circuit, 574 Simple current monitoring solutions, 681–682 Simple driver circuit, 711–712 Simple window-function status monitor, 596 Sine waves, detecting, 953–954 Single 4-input IC, 699 number of inputs, expanding, 699–700 PC board layouts, 700 switching transients, 700 Single buck 1A LED driver, 629–630 Single cell lithium-ion battery supply, 1040 Single supply 16-Bit ADC driver, 914 Single supply driver, 714 Single switch circuit, 9–10 Single-cell Li-Ion operation, 197–198 Single-ended half-bridge digitizer with reference and ground sensing, 737–738 Single-ended primary inductance converter (SEPIC), 269–270 Single-ended to differential amplifier design, 897 DC coupled differential amplifier, 897–898 input impedance matching, 897 Single-ended to differential converter, 715 SLA battery charger (36V, 2.5A), 609–610 SLEEP, 764 SLIC (subscriber line interface circuit), 309–310 Small area photodiode amplifiers, 905 Smart card interfacing, 821 “Smart rock”, 837 blanking, 838 micropower subcircuits, 837–838 IF amplifier, 837 oscillator, 837 power driver, 837–838 receiver, 838 transmitter, 838 SMBus (System Management Bus), 31–32 fan speed controller, 17 “Snap-back” current limiting, 918 SO-8 MOSFETs, 30 SO-8 packaged 2-channel devices, 759 SO-8 packages, LT1328 in, 1089 “Soft latch” OVP circuit, 194 Soft-start and undervoltage lockout, 301–302 Solar-powered battery charger, 608 Solid tantalum, 59 SOT-23 LDOs, 349 SOT-23 Li-Ion battery charger, 445 SOT-23 op amps, 1013 LT1782/LT1783 SOT-23 op amps, 1013–1014 Over-The-Top applications, 1014 tough general purpose op amps, 1013–1014 tough op amps, 1014 SOT-23 SMBus fan speed controller, 17 Source resistance induced distortion, 947 results, 948 test circuit, 947–948 SPICE macromodel for op amps, 961–962, 967–968 SPICE models, 975–976 Spread spectrum frequency modulation (SSFM), 385 Spread spectrum performance, 717 STAT pin, 403–404 Step-down converter, 665 with adjustable output down to 800mV, 665–666 input current limit, 666 24V regulator with 300mA output current limit and input undervoltage lockout, 666 Step-down synchronous controller, 103 2-step voltage regulation, 37–38 CPU core voltage regulator for, 37 power loss curve for, 37 1-step vs 2-step power conversion, 37–38 Supercapacitor characteristics, 517–518 1103 Index Supercapacitor-based power backup prevents data loss in RAID systems, 513 Supercapacitor-based power backup system, 511 in RAID systems, 513 Supply bypass capacitors, 957–958 4-switch buck-boost converter, 319, 327–328 Switching regulator, 61 SYNC/FCB pin, 192 Synchronous boost converter, 671 Synchronous converter, 578 Synchronous flyback controller, 572 Synchronous forward converter, Synchronous rectification, advantages of, 667 Synchronous step-down converter (36V–72V to 2.5V/6A), 677 System Management Bus (SMBus), 827–828 data integrity, 827–828 T TC4300-1, 551–552 Telecom power monitoring with PoE, 675–676 Telecom/automotive supplies DC/DC conversion of 100V inputs for, 677 feature-rich controller, 677–678 high efficiency 36V–72V to 2.5V/6A power supply, 678 Telephone ring-tone generation, 1091 open-architecture ring-tone generator, 1091 quad op amp, 1091–1092 requirements, 1091 wave form synthesizer, 1092 Temperature measurement silicon sensors, 812 thermilinear networks, 812 thermistors, 812 thermocouple systems, 811–812 using data acquisition systems, 811 2-terminal current source, 521–522 TFT LCD bias supply, 621–622 TFT LCD power supply, 636 TFT-LCD displays, 625–626 Thermal Shutdown Status (THE), 18 Thermilinear networks, 812 Thermistors, 812 Thermocouple amplification, 878 battery-powered, 877–878 filtering and protection, 878 requirements of, 877 Thermocouple systems, 811–812 ThinSOT package, 129–130 ThinSOT switching regulator, 249 Time division duplex (TDD) transmission, 1063 TIMER pin, 452 Tiny amplifiers current feedback amplifiers, 901–902 driving heavy capacitive loads at speed, 901 1104 Tiny regulators, 651 brightness control, 652 circuit descriptions, 651–652 Tiny RGB video multiplexer, 693 adding own logo, 694 expanding inputs, 693–694 Tiny SC70 package, 643 Tip-acceleration detector, for shipping containers, 990 Total harmonic distortion (THD), 947 Tough general purpose op amps, 1013–1014 Tough op amps, 1014 TRACK/SS pins, 386 Tracking and sequencing, 589 basic operation, 589–590 negative supply tracking, 590 Transformer-coupled loads, driving, 941–942 Transimpedance amplifier, 923–924 TRIAC dimmable 20W offline LED, 611 Tried-and-true architecture, 304 Triple buck regulator, 97 Triple output 3-phase controller, 115 Triple step-down regulator, 107 TriQuint Semiconductor, 717 True bipolar input (±10.24V), generating, 711 layout, importance of, 712 simple driver circuit, 711–712 True rail-to-rail, high input impedance ADC, 723 applications, 724 solving common issues, 723–724 TSET pin voltage, 614 Turbo BASIC, 800 Two op amp instrumentation amplifier, 936 U Ultralow noise op amp, 965–966 UltraFast comparators, 1033 Ultralow dropout regulator, 365 Ultralow noise switching power supplies, 55 Ultralow power crystal oscillator, 837 Ultralow quiescent current, 489–490 Ultraprecise current sense amplifier, 981 design tips and details, 982 own sense resistors, printing, 982 precision buys efficiency, 981–982 Ultraprecise instrumentation amplifier, 877 Unconditionally stable amplifiers, 950 Undervoltage lockout (UVLO), 416 detection circuitry, 374 Undervoltage/overvoltage detector, 1040 Universal 16-bit analog output, 777 “Universal” DSP front end, 1008 Universal LED driver, 623 Universal serial bus (USB) devices, 269 USB, 435–436 charging from, 436 faster charging with system in full operation, 436 power manager, 426 USB power management system, 669 in large transient environments, 669–670 overvoltage protection, 670 USBSNS pin, 416 V 100V controller, 615–616 boost, 616 buck mode, 616 buck-boost mode, 616 V.35 transceivers, 845 complete V.35 port, 846 LTC1345, 846 problems with traditional implementations, 845–846 Variable gain amplifier plus analogto-digital converter (VGA + ADC) combination circuit, 1061 VCCS GOSIT, 962 Versatile voltage monitors, 583 basic operation, 583–584 minimum fault length monitor, 584 Very low dropout (VLDO) linear regulators, 111–112, 347–348 V-F converter, 797–798 Vid_3.3V, power solution for, 562 Video circuits collection, 703 DC restore circuits, 704 fader circuits, 704 loop through cable drivers, 704 multiplex amplifiers, 703–704 Video difference amplifier, 689 dual input pair zaps common mode noise pickup, 689–690 video rate analog arithmetic, 690 Video rate analog arithmetic, 690 Video signal distribution using low supply voltage amplifiers, 691 amplifier considerations, 692 handling AC-coupled video signals, 692 video signal characteristics, 691–692 VOLDET, 359–360 Voltage control (VC) pin, 7–8 Voltage Controlled Amplifier (VCA), 705–706 Voltage doubler for output voltages below 4.7V, 81–82 Voltage feedback amplifiers, 950 Voltage references, 997, 1039–1040 Voltage regulator, 610 Voltage-control method, 624 Voltage-controlled crystal oscillators (VCXO), 1035 1VP-P video waveform, 691 “VPP Lock” line, 65 VPP switcher, 850 “Vpp” amplitudes, 291–292 VTT reference (VTTR), 300 VTT supply, 300 W WALLSNS pin, 416 WBC16-1T, 1059 WCDMA ACPR measurements, 1077–1078 WCDMA amplifier and ADC driver, 1080 WCDMA dynamically controlled power amp power supply, 442 WCDMA signal, 1061–1062 White LED backlight, 622 driving, 651 White LED driver easy dimming control, 644 Li-Ion powered driver for, 643–644 in tiny SC70 package, 643 White LEDs from 2-alkaline cell source (1.8V to 3.0V), 640 from automotive power source (9V to 16V), 640 DC/DC converters, 639 dimming control, 642 driving from power sources, 639 Li-Ion LED driver for, 647–648 Li-Ion-powered driver for, 641–642 from lithium-ion source (3.3V to 4.2V), 639–640 portable computers, DC/DC converters for, 337 Wide bandwidth CMRR, 758 Wide input range 1A LED driver, 631 automotive LED driver, 631 driving LEDs from 12V AC input, 631–632 thermal regulation, 632 Wideband bandpass filters, 1023 Wideband RF ICs dual-band mobile phone transmitter power control application, 1081–1082 RF power detectors, application of, 1082 RFID reader application, 1082 Wideband voltage controlled amplifier, 705–706 2-wire bus systems, nested addressing in, 820 Wireless infrastructure time division duplex (TDD) transmit applications, 1063 X XENPAK Multisource Agreement (MSA), 153 Z Zener diode technology, 994 Zero Volt Transient, 539, 542 “Zeta” step-up/step-down converter, 186 ... 214 33 1 494 36 4 167 33 2 477 36 5 131 33 3 468 36 6 127 33 4 4 63 367 96 33 5 456 36 8 297 33 6 400 36 9 112 33 7 37 9 37 0 106 33 8 36 8 37 1 38 33 9 34 1 37 2 35 34 0 274 37 3 26 34 1 259 37 4 24 34 2 257 37 5 19 34 3... 31 8 37 4 35 1 159 31 9 39 6 35 2 1 53 320 39 4 35 3 146 32 1 34 3 35 4 138 32 2 32 7 35 5 116 32 3 205 35 6 104 32 4 92 35 7 88 32 5 81 35 8 66 32 6 79 35 9 60 32 7 65 36 0 448 32 8 57 36 1 431 32 9 55 36 2 33 7 33 0 522 36 3... Signal����������������������������������������������������������������������������������������������707 Section Data Conversion: Analog- to-Digital 709 33 0 33 1 33 2 33 3 33 4 33 5 33 6 33 7 33 8 33 9 34 0 34 1 34 2 34 3 34 4 34 5 34 6 34 7 34 8 34 9 35 0 35 1 35 2 35 3 Generating a ±10.24V true bipolar