LTC1709EG Просмотр технического описания (PDF) - Linear Technology

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LTC1709EG

2-Phase, 5-Bit Adjustable, High Efficiency, Synchronous Step-Down Switching Regulator

Linear Technology 

W

FU CTIO AL DIAGRA

LTC1709

PLLIN

FIN

50k

PLLFLTR

RLP

CLP

VOS–

VOS+

AMPMD

DIFFOUT

VIN

VIN

EXTVCC

INTVCC

+5V

SGND

PHASE DET

OSCILLATOR

CLK1

CLK2

TO

SECOND

CHANNEL

A1

–

+

0V POSITION

0.8V

VREF

4.7V +

5V

–

LDO

REG

INTERNAL

SUPPLY

DUPLICATE FOR

SECOND 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

RST

4(VFB)

INTVCC

30k SENSE+

30k SENSE–

L

RSENSE

COUT

45k

2.4V

VFB

EAIN

EA

0.80V

OV

VOUT

0.86V

ITH CC

RUN

SOFT-

START

RC

RUN/SS

ATTENIN R2

CSS

20k

5-BIT VID DECODER

ATTENOUT

R1 R1 VARIABLE

TYPICAL ALL

VID PINS

40k

VID0 VID1 VID2 VID3 VID4

VBIAS

1709 FBD

9

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