LTC3728LIGN-1 查看數據表（PDF） - Linear Technology

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LTC3728LIGN-1

Dual, 550kHz, 2-Phase Synchronous Regulator

Linear Technology 

LTC3728L-1

FUNCTIONAL DIAGRAM

PLLIN

FIN

50k

PLLFLTR

RLP

CLP

PGOOD

PHASE DET

DUPLICATE FOR SECOND

CONTROLLER CHANNEL

INTVCC

VIN

BOOST

DB

OSCILLATOR

CLK1

CLK2

0.86V

VOSENSE1

0.74V

0.86V

VOSENSE2

DROP

OUT

DET

SQ

RQ

BOT FCB

TOP ON

TG

TOP

SW

SWITCH

LOGIC

INTVCC

BG

BOT

0.55V

+B

–

SHDN

PGND

CB

+

D1

CIN

COUT

+

RSENSE

INTVCC

3V

0.18μA

R6

FCB

R5

4.5V –

+

+

–

0.74V

BINH

FCB

3.3VOUT

0.8V

VREF

VIN

VIN

EXTVCC

4.8V +

–

INTVCC

5V

+

SGND (UH PACKAGE PAD)

5V

LDO

REG

INTERNAL

SUPPLY

I1

I2

–

– ++ –

+

0.86V

3mV

4(VFB)

SLOPE

COMP

45k

45k

2.4V

EA

OV

INTVCC

30k SENSE+

30k SENSE–

VFB

0.80V

VOSENSE

1.2μA

6V

0.86V

SHDN

RST

4(VFB)

RUN

SOFT

START

ITH

RUN/SS

R2

R1

CC

CC2

RC

CSS

VOUT

3728L1 F02

Figure 2

3728l1fc

9

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