LTC1702A View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC1702A

Dual 550kHz Synchronous 2-Phase Switching Regulator Controller

Linear Technology 

LTC1702A

TYPICAL APPLICATION

Low Cost Dual Supply with 2.5V Keepalive

VIN

5V

±10%

STBY/ON

10k

0.1%

1k

1k

4.75k +

0.1%

330pF

68k

QSS1

QSS2

+

10Ω

CIN

10µF

VCC

PVCC

FB2

56pF

COMP2

BOOST2

TG2

SW2

RUN/SS2

BG2

RUN/SS1

0.1µF

IMAX2

LTC1702A FAULT

BOOST1

36.5k

FB1

20k

220pF

56k

39pF

TG1

1%

COMP1

SW1

BG1

FCB

16k

15k

1%

IMAX1

SGND

PGND

MBR0530T

IN OUT

1µF LT1761

GND ADJ

QT2

1µF

L2

QB2

QT1B

MBR0530T

QT1A

1µF

L1

QB1B

QB1A

16.2k

0.1%

16.9k

0.1%

+

VOUT2

2.5V/7A

2.45V/100mA

STANDBY

COUT2

VOUT1

1.8V

+

20A

COUT1

CIN = SANYO 10MV1200GX (6 IN PARALLEL)

COUT1 = SANYO 6MV1500GX (8 IN PARALLEL)

COUT2 = SANYO 6MV1500GX (3 IN PARALLEL)

L1: 1µH SUMIDA CEP125-1R0MC-H

L2: 2.2µH COILTRONICS UP2B-2R2

QSS1, QSS2: MOTOROLA MMBT3904LT1

QT1A, QT1B, QB1A, QB1B: FAIRCHILD FDS6670A

QT2, QB2: 1/2 SILICONIX Si4966

1702A TA04

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

1702afa

36 Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

LT 0306 REV A • PRINTED IN USA

© LINEAR TECHNOLOGY CORPORATION 2002

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