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SC1102
(Rev.:2000)

SYNCHRONOUS DC/DC CONTROLLER FOR DISTRIBUTED POWER SUPPLY APPLICATIONS

Semtech Corporation 

SYNCHRONOUS DC/DC CONTROLLER FOR

SC1102

DISTRIBUTED POWER SUPPLY APPLICATIONS

September 5, 2000

PIN DESCRIPTION

Pin #

1

2

3

4

5

6

7

8

9

10

11

12

13

14

Pin Name

VCC

PWRGD

OVP

OCSET

PHASE

DH

PGND

DL

BSTL

BSTH

SENSE

VREF

SS/SHDN

GND

Pin Function

Chip supply voltage

Logic high indicates correct output voltage

Over voltage protection.

Sets the converter overcurrent trip point

Input from the phase node between the MOSFET’S

High side driver output

Power ground

Low side driver output

Bootstrap, low side driver.

Bootstrap, high side driver.

Voltage sense input

Buffered band gap voltage reference.

Soft start. A capacitor to ground sets the slow start time.

Signal ground

NOTE:

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

CHARACTERISTIC CURVES

SC1102 Voltage Regulation, Vin=5V

2%

1%

3.3V

2.5V

0%

2.0V

1.3V

-1%

-2%

0 1 2 3 4 5 6 7 8 9 10 11 12

Current, A

SC1102 Effiency, Vin=5V

100%

90%

80%

70%

60%

0 1 2 3 4 5 6 7 8 9 10 11 12

Current, A

3.3V

2.5V

2.0V

1.3V

© 2000 SEMTECH CORP.

4

652 MITCHELL ROAD NEWBURY PARK CA 91320

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