LTC1709EG-8 查看數據表（PDF） - Linear Technology

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LTC1709EG-8

2-Phase, 5-Bit VID, Current Mode, High Efficiency, Synchronous Step-Down Switching Regulators

Linear Technology 

W

FU CTIO AL DIAGRA

LTC1709-8/LTC1709-9

PLLIN

fIN

50k

RLP PLLFLTR

CLP

PHASE DET

OSCILLATOR

CLK1

CLK2

PGOOD

VOS–

R

VOS+

R

DIFFOUT

R

A1

–

+

R

0.86V

EAIN

0.74V

VIN

VIN

EXTVCC

INTVCC

+5V

SGND

0.80V

VREF

4.7V +

5V

–

LDO

REG

INTERNAL

SUPPLY

20k (LTC1709-8)

ATTENIN 10k (LTC1709-9)

ATTENOUT

R1

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

I1

–+

0.86V

4(VFB)

SLOPE

COMP

45k

SHDN

45k

2.4V

EA

OV

1.2µA

6V

SHDN

RST

4(VFB)

RUN

SOFT

START

INTVCC

30k SENSE+

30k SENSE–

L

RSENSE

COUT

EAIN

VOUT

0.80V

0.86V

ITH CC

RC

RUN/SS

CSS

5-BIT VID DECODER

TYPICAL ALL

VID PINS

40k

VID0 VID1 VID2 VID3 VID4

VBIAS

170989 FBD

9

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