LTC3302

9

Rev. 0

For more information www.analog.com

BLOCK DIAGRAM

+

–

0.4V

FAULT

FAULT

+

–

0.55V

+

–

0.49V

SS

ISS

3302 BD

VIN

VIN

SW

PGND

FB OR VOUT

PGOOD

L

COUT

VOUT

CIN

VIN

CSS

SWITCH LOGIC

AND

ANTI-SHOOT

THROUGH

Q

S

R

MODE/SYNC

BURST

DETECT

+

–

OSCILLATOR

INTERNAL

REFERENCE

SLOPE

COMP

EN

R1

(OPT)

R2

(OPT)

AGND

0.55V

0.5V

0.49V

MODE

DETECT

BURST

FORCED CONTINUOUS

PULSE-SKIP

RC

CC

CPAR

GM

0.5V

VC

2, 3

4, 5

6, 7

10

9

8

1

11

12

AVIN

RA

RB

CFF

RAVIN

CAVIN

NOTES:

FOR THE LTC3302 ADJUSTABLE VERSION, PIN 10 IS FB. FB IS HIGH IMPEDANCE AND RB RESISTANCE IS INFINITE.

THE FB PIN REGULATES TO THE 500mV TARGET.

FOR THE LTC3302 FIXED OUTPUT VOLTAGE VERSIONS, PIN 10 IS VOUT. RB IS INTERNALLY SET FOR THE REGULATION

TARGET. THE VOUT PIN IS NOT HIGH IMPEDANCE AND REGULATES TO THE OUTPUT VOLTAGE TARGET.