LTC1709EG-85 datasheet(9/28 Pages) LINER

Part #	LTC1709EG-85

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

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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9

LTC1709-85

170985f

FU CTIO AL DIAGRA

SWITCH

LOGIC

0.80V

4.8V

5V

VIN

CLK2

TO SECOND

CHANNEL

CLK1

+

–

+

VREF

INTERNAL

SUPPLY

EXTVCC

INTVCC

SGND

+

5V

LDO

REG

SW

SHDN

0.55V

TOP

BOOST

TG

CB

CIN

D1

DB

PGND

BOT

BG

INTVCC

VIN

+

170985 FBD

EAIN

VFB

DROP

OUT

DET

RUN

SOFT

START

BOT

FCB

TOP ON

S

R

Q

OSCILLATOR

PLLFLTR

50k

EA

0.86V

0.80V

OV

1.2

µA

6V

–

+

RC

4(VFB)

RST

SHDN

RUN/SS

ITH

CC

CSS

4(VFB)

0.86V

SLOPE

COMP

+

–

+

–

SENSE–

SENSE+

INTVCC

30k

45k

2.4V

45k

RSENSE

30k

I1

I2

B

ATTENIN

10k

R1

VID25mV

ATTENOUT

VID0

VID1

VID2

VID3

TYPICAL ALL

VID PINS

40k

VBIAS

PHASE DET

PLLIN

DUPLICATE FOR SECOND

CONTROLLER CHANNEL

CC2

+

–

+

–

COUT

VOUT

fIN

RLP

CLP

A1

+

–

DIFFOUT

VOS

+

VOS

–

0.74V

0.86V

+

–

+

–

EAIN

PGOOD

5-BIT VID DECODER

–

+

4.5V

0.18

µA

+

–

FCB

3V

FCB

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LTC1709EG-85 Datasheet(PDF) 9 Page - Linear Technology

LTC1709EG-85 Datasheet(HTML) 9 Page - Linear Technology

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