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SC1164

PROGRAMMABLE SYNCHRONOUS DC/DC CONVERTER, DUAL LOW DROPOUT REGULATOR CONTROLLER

Semtech Corporation 

PROGRAMMABLE SYNCHRONOUS DC/DC

CONVERTER, DUAL LOW DROPOUT

REGULATOR CONTROLLER

SC1164/5

October 25, 1999

PIN DESCRIPTION

Pin Pin Name

1 AGND

2 GATE1

3 LDOS1

4 LDOS2

5 VCC

6 OVP

7 PWRGOOD(1)

8 CS-

9 CS+

10 PGNDH

11 DH

12 PGNDL

13 DL

14 BSTL

15 BSTH

16 EN(1)

17 VOSENSE

18 VID4(1)

19 VID3(1)

20 VID2(1)

21 VID1(1)

22 VID0(1)

23 LDOV

24 GATE2

Pin Function

Small Signal Analog and Digital Ground

Gate Drive Output LDO1

Sense Input for LDO1

Sense Input for LDO2

Input Voltage

High Signal out if VO>setpoint +20%

Open collector logic output, high if VO

within 10% of setpoint

Current Sense Input (negative)

Current Sense Input (positive)

Power Ground for High Side Switch

High Side Driver Output

Power Ground for Low Side Switch

Low Side Driver Output

Supply for Low Side Driver

Supply for High Side Driver

Logic low shuts down the converter;

High or open for normal operation.

Top end of internal feedback chain

Programming Input (MSB)

Programming Input

Programming Input

Programming Input

Programming Input (LSB)

+12V for LDO section

Gate Drive Output LDO2

Top View

AGND

GATE1

LDOS1

LDOS2

VCC

OVP

PWRGOOD

CS-

CS+

PGNDH

DH

PGNDL

1

24

GATE2

2

23

LDOV

3

22

VID0

4

21

VID1

5

20

VID2

6

19

VID3

7

18

VID4

8

17

VOSENSE

9

16

EN

10

15

BSTH

11

14

BSTL

12

13

DL

(24 Pin SOIC)

Note:

(1) All logic level inputs and outputs are open

collector TTL compatible.

© 1999 SEMTECH CORP.

3

652 MITCHELL ROAD NEWBURY PARK CA 91320

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