LTC1629 データシートの表示（PDF） - Linear Technology

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LTC1629

PolyPhase, High Efficiency, Synchronous Step-Down Switching Regulators

Linear Technology 

W

FU CTIO AL DIAGRA

LTC1629/LTC1629-PG

LTC1629-PG PGOOD CONNECTION

DIFFOUT

VOS–

PGOOD

0.86V

VOS+

A1

–

+

EAIN

0.74V

THE AMPMD PIN ON

THE LTC1629 IS

REPLACED BY A PGOOD

PIN IN THE LTC1629-PG

PLLIN

FIN

PHASE DET

50k

PLLLPF

RLP

CLKOUT

CLK1

CLP

OSCILLATOR CLK2

PHASMD

PHASE LOGIC

±2µA

DUPLICATE FOR SECOND

CONTROLLER CHANNEL

INTVCC

VIN

BOOST

DB

DROP

OUT

TG

CB

TOP

DET

BOT FCB

FORCE BOT

SW

SQ

RQ

SWITCH

LOGIC

INTVCC

BG

BOT

+

CIN

LTC1629

ONLY

VOS–

VOS+

A1

–

+

AMPMD

DIFFOUT

0V POSITION

I1

–+

0.86V

4(VFB)

SLOPE

COMP

45k

SHDN

45k

2.4V

PGND

INTVCC

30k SENSE+

30k SENSE–

L

RSENSE

COUT

EAIN

VOUT

R1

VIN

VIN

EXTVCC

INTVCC

5V

+

SGND

0.80V

VREF

4.7V +

5V

–

LDO

REG

INTERNAL

SUPPLY

1.2µA

6V

SHDN

RST

4(VFB)

EA

OV

RUN

SOFT

START

0.80V

0.86V

R2

ITH CC

RC

RUN/SS

CSS

1629 FBD

9

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