SC1109 Ver la hoja de datos (PDF) - Semtech Corporation

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SC1109

SYNCHRONOUS PWM CONTROLLER WITH DUAL LOW DROPOUT REGULATOR CONTROLLERS

Semtech Corporation 

PRELIMINARY - October 16, 2000

SYNCHRONOUS PWM CONTROLLER WITH

DUAL LOW DROPOUT REGULATOR

CONTROLLERS

SC1109

PIN DESCRIPTION

Pin Pin Name

1 LDOS1

2 GATE1

3 STBY

4 BCAP+

5 BCAP-

6 GND

7 PHASE

8 DL

9 DH

10 BST

11 VCC

12 PWRGD

13 VOSENSE

14 SS/EN

15 GATE2

16 LDOS2

Pin Function

Sense Input for LDO1

Gate Drive Output LDO1 (1.8V)

5V Standby Input, supplies power for

Ref, Charge Pump, Oscillator and FET

controllers.

Positive Connection to Boost Capacitor

Negative Connection to Boost Capacitor

Ground

Phase Node

Low Side Driver Output

High Side Driver Output

Boost Input

Power Supply Input

Open Collector Power Good Flag for

1.2V Output

Output Sense Input for 1.2V Output

Soft Start/ Enable

Gate Drive Output LDO2 (2.5V)

Sense Input for LDO2

PIN CONFIGURATION

Top View

LDOS1 1 16

GATE1 2 15

STBY 3 14

BCAP+ 4 13

BCAP- 5 12

GND 6 11

PHASE 7 10

DL 8

9

LDOS2

GATE2

SS/EN

VOSENSE

PWRGD

VCC

BST

DH

(16 Pin SOIC)

© 2000 SEMTECH CORP.

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TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com

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