SC1173 Ver la hoja de datos (PDF) - Semtech Corporation

Número de pieza

componentes Descripción

Lista de partido

SC1173

PROGRAMMABLE SYNCHRONOUS DC/DC CONVERTER WITH LOW DROPOUT REGULATOR CONTROLLER

Semtech Corporation 

October 25, 1999

PIN DESCRIPTION

PROGRAMMABLE SYNCHRONOUS DC/DC

CONVERTER WITH LOW DROPOUT

REGULATOR CONTROLLER

SC1172/3

Pin Pin Name

1 AGND

2 NC

3 NC

4 LDOS

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 GATE

Pin Function

Small Signal Analog and Digital Ground

No connection

No Connection

Sense Input for LDO

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 LDO

Top View

AGND

1

NC

2

NC

3

LDOS

4

VCC

5

OVP

6

PWRGOOD

7

CS-

8

CS+

9

PGNDH

10

DH

11

PGNDL

12

24

GATE

23

LDOV

22

VID0

21

VID1

20

VID2

19

VID3

18

VID4

17

VOSENSE

16

EN

15

BSTH

14

BSTL

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

Share Link: