RT9221 Просмотр технического описания (PDF) - Richtek Technology

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RT9221

Programmable Synchronous PWM Buck Converter with 1.5V/2.5V Dual Low Dropout Linear Regulator Controller

Richtek Technology 

RT9221

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

6 OVP

High signal out if V0 > setting point + 20%

7

PGOOD (1) Open collector logic output; High if V0 within 10% of the setting point

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

18

VID4 (1)

19

VID3 (1)

20

VID2 (1)

21

VID1 (1)

22

VID0 (1)

Top end of internal feedback chain

Programming input (MSB)

Programming input

Programming input

Programming input

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.

www.richtek-ic.com.tw

4

DS9222-05 May 2001

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