LTC1702IGN datasheet(36/36 Pages) LINER

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LTC1702

1702f LT/TP 0100 4K • PRINTED IN USA

©LINEAR TECHNOLOGY CORPORATION 1999

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408)432-1900q FAX:(408)434-0507 q www.linear-tech.com

TYPICAL APPLICATION

RELATED PARTS

PART NUMBER

DESCRIPTION

COMMENTS

LTC1530

High Power Synchronous Step-Down Controller

SO-8 with Current Limit. No RSENSE Required

LTC1625

No RSENSE

TM Current Mode Synchronous Step-Down Controller

Above 95% Efficiency, Needs No RSENSE, 16-Lead SSOP Package

Fits SO-8 Footprint

LTC1628

Dual High Efficiency 2-Phase Synchronous Step-Down Controller

Constant Frequency, Standby 5V and 3.3V LDOs, 3.5V

≤ VIN ≤ 36V

LTC1703

Dual 550kHz Synchronous 2-Phase Switching Regulator Controller LTC1702 with 5-Bit Mobile VID for Mobile Pentium

® Processor

with Mobile VID

Systems

LTC1706-81

VID Voltage Programmer

Adds 5-Bit Mobile VID to 0.8V Referenced Switching

Regulators

LTC1709

2-Phase, 5-Bit Desktop VID Synchronous Step-Down Controller

Current Mode, VIN to 36V, IOUT Up to 42A

LTC1736

Synchronous Step-Down Controller with 5-Bit Mobile VID Control

Fault Protection, PowerGood, 3.5V to 36V Input, Current Mode

LTC1753

5-Bit Desktop VID Programmable Synchronous

1.3V to 3.5V Programmable Output Using Internal 5-Bit DAC

Switching Regulator

LTC1873

Dual Synchronous Switching Regulator with 5-Bit Desktop VID

1.3V to 3.5V Programmable Core Output Plus I/O Output

LTC1929

2-Phase, Synchronous High Efficiency Converter

Current Mode Ensures Accurate Current Sensing,

VIN Up to 36V, IOUT Up to 40A

No RSENSE is a trademark of Linear Technology Corporation. Pentium is a registered trademark of Intel Corporation.

Low Cost Dual Supply with 2.5V Keepalive

FB2

COMP2

RUN/SS2

FB1

COMP1

FCB

BOOST2

TG2

SW2

BG2

IMAX2

VCC

PVCC

SGND

PGND

LTC1702

4.75k

0.1%

0.1

µF

39pF

56pF

220pF

330pF

56k

20k

16k

QSS2

QSS1

CIN = SANYO 10MV1200GX (6 IN PARALLEL)

COUT1 = SANYO 6MV1500GX (8 IN PARALLEL)

COUT2 = SANYO 6MV1500GX (3 IN PARALLEL)

L1: 1

µH SUMIDA CEP125-1R0MC-H

L2: 2.2

µH COILTRONICS UP2B-2R2

VIN

±10%

STBY/ON

68k

10k

0.1%

47k

QT2

MBR0530T

µF

QB2

QT1A

QT1B

MBR0530T

µF

COUT1

1702 TA04

COUT2

µF

CIN

µF

16.9k

0.1%

16.2k

0.1%

VOUT2

2.5V/7A

2.45V/100mA

STANDBY

VOUT1

1.8V

20A

Ω

QB1A

QB1B

33k

FAULT

BOOST1

TG1

SW1

BG1

IMAX1

OUT

GND

LT1761

ADJ

RUN/SS1

QSS1, QSS2: MOTOROLA MMBT3904LT1

QT1A, QT1B, QB1A, QB1B: FAIRCHILD FDS6670A

QT2, QB2: 1/2 SILICONIX Si4966

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