LTC1929I Просмотр технического описания (PDF) - Linear Technology

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LTC1929I

2-Phase, High Efficiency, Synchronous Step-Down Switching Regulators

Linear Technology 

W

FU CTIO AL DIAGRA

LTC1929/LTC1929-PG

LTC1929-PG OPTIONAL PGOOD HOOKUP

DIFFOUT

PGOOD

VOS–

VOS+

A1

–

+

0.86V

EAIN

0.74V

PLLIN

FIN

PHASE DET

50k

PLLFLTR

RLP

CLK1

CLP

OSCILLATOR CLK2

LTC1929 ONLY VOS–

VOS+

A1

–

+

AMPMD

DIFFOUT

0V POSITION

VIN

VIN

EXTVCC

INTVCC

5V

+

SGND

0.8V

VREF

4.7V +

5V

–

LDO

REG

INTERNAL

SUPPLY

DUPLICATE FOR SECOND

CONTROLLER CHANNEL

INTVCC

VIN

BOOST

DB

DROP

OUT

TG

CB

TOP

DET

BOT

FORCE BOT

SW

SQ

RQ

SWITCH

LOGIC

INTVCC

BG

BOT

PGND

+

CIN

SHDN

I1

–+

4(VFB)

SLOPE

COMP

45k

VIN

1.2µA

6V

SHDN

4(VFB)

INTVCC

30k SENSE+

30k SENSE–

L

RSENSE

COUT

45k

2.4V

EA

OV

VFB

0.80V

EAIN

VOUT

R1

R2

0.86V

ITH CC

RUN

SOFT-

START

RC

RUN/SS

CSS

1929 FBD

9

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