LTC3619BIDD(RevA) View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC3619BIDD
(Rev.:RevA)

400mA/800mA Synchronous Step-Down DC/DC with Average Input Current Limit

Linear Technology 

Functional Diagram

REGULATOR 1

PGOOD1 8

0.654V

VFB1

0.546V

VFB1 10

–

ITH

EA

+

0.6V

MIN

CLAMP

SLOPE

COMP

–

VSLEEP +

SLEEP

–+

ICOMP

SOFT-START

S

Q

RS

LATCH

R

Q

SWITCHING

LOGIC

AND

BLANKING

CIRCUIT

ANTI

SHOOT-

THRU

LTC3619B

6 VIN

+

ICOMP

–

7 SW1

SHUTDOWN

IRCMP

RUN1 2

0.6V REF

OSC

RUN2 9

OSC

SLEEP2

SLEEP1

TO REGULATOR 2 ONLY

1V

VFB2 1

–

– EA

+

0.6V

MIN

CLAMP

SLOPE

COMP

ITH

–

SLEEP

VSLEEP +

–+

ICOMP

PGOOD2 4

SOFT-START

0.654V

VFB2

0.546V

S

Q

RS

LATCH

R

Q

SWITCHING

LOGIC

AND

BLANKING

CIRCUIT

ANTI

SHOOT-

THRU

REGULATOR 2

SHUTDOWN

IRCMP

+

ICOMP

–

11 GND

3 RLIM

6 VIN

5 SW2

11 GND

3619B FD

3619bfa



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