LTC3789 Просмотр технического описания (PDF) - Linear Technology

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LTC3789

High Efficiency, Synchronous, 4-Switch Buck-Boost Controller

Linear Technology 

LTC3789

Block Diagram

CHARGE

PUMP

BOOST1

CHARGE

PUMP

BOOST2

VFLD

1.2µA

RUN

SHDN

MODE/

PLLIN

FIN

PHASE DET

220k

FREQ

10µA

OSCILLATOR

VIN

VIN

4.8V +

EXTVCC

–

+5.5V

INTVCC

SGND

10

IDREV

VIN

+

SW1

–

IREV

+

–

ICMP

+

–

SLOPE

INTVCC VIN

BOOST1

FCB

TG1

BUCK

LOGIC

SW1

INTVCC

BG1

PGND

BG2

FCB

BOOST

LOGIC

INTVCC SW2

TG2

BOOST2

OV

IOS

EA

3µA

IOSENSE+

IOSENSE–

ILIM

INTVCC

VFB

0.80V SS

RSENSE

RSENSE2

+

VOUT

EXTVCC

5.5V

5.5V

LDO

LDO

REG

REG

–

0.86V

+

VFB

–

INTERNAL

SUPPLY

+

0.74V

ITH

SENSE+

SENSE–

OV

PGOOD

3789 BD

3789f

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