RT9221

www.richtek-ic.com.tw

DS9222-05 May 2001

4

Pin Description

Pin No. Pin Name

Pin Function

1

GND

Small signal analog and digital ground

2

GATE1

LDO1 gate drive output

3

LDOS1

LDO1 sense input

4

LDOS2

LDO2 sense input

5

VCC

Input voltage

6OVP

> setting point + 20%

7

PGOOD

(1)

8

CSN

Current sense input (Negative)

9

CSP

Current sense input (Positive)

10

PGNDH

High side drive GND

11

DH

High side drive output

12

PGNDL

Low side drive GND

13

DL

Low side drive output

14

BSTL

Supply for low side driver

15

BSTH

Supply for high side driver

16

SHDN

(1)

Logic low shutdown the converter

17

VSEN

Top end of internal feedback chain

18

VID4

(1)

Programming input (MSB)

19

VID3

(1)

Programming input

20

VID2

(1)

Programming input

21

VID1

(1)

Programming input

22

VID0

(1)

Programming input (LSB)

23

LDOV

+12V for LDO section

24

GATE2

LDO2 gate drive output

Note: (1) All logic level inputs and outputs are TTL compatible.