SC1157

PROGRAMMABLE SYNCHRONOUS DC/DC

CONTROLLER FOR ADVANCED PROCESSORS

© 2000 SEMTECH CORP.

652 MITCHELL ROAD NEWBURY PARK CA 91320

Preliminary - August 7, 2000

3

PIN CONFIGURATION

NOTE:

(1) All logic level inputs and outputs are open collector TTL compatible.

PIN DESCRIPTION

Pin #

Pin Name

Pin Function

1

GND

Small Signal Analog and Digital Ground

2

REF

Buffered Reference output

3V

CC

Chip Supply Voltage

4

CS(-)

Current Sense Input (negative)

5

CS(+)

Current Sense Input (positive)

6

PGND

Power Ground for High and Low Side Drivers

7

DH

High Side Driver Output

8

DL

Low Side Driver Output

9

BSTL

Vcc for Low Side Driver (Boost)

10

BSTH

Vcc for High Side Driver (Boost)

11

SHUTDOWN

Logic Low shuts down the converter; High or open for normal operation.

12

VOSENSE

Top end of internal feedback chain

13

VID3

(1)

Programming Input (MSB)

14

VID2

(1)

Programming Input

15

VID1

(1)

Programming Input

16

VID0

(1)

Programming Input (LSB)