Datasheet > RT9903BPQV

RT9903BPQV

更新时间： 2024-11-08 03:22:27

品牌	Logo	应用领域
立锜 - RICHTEK		转换器
页数	文件大小	规格书
15页	415K
描述
4 Channel DC/DC Converters IC with High-Efficiency Step-Up

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中文翻译

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RT9903BPQV 数据手册

Preliminary

RT9903B

4 Channel DC/DC Converters IC with High-Efficiency Step-Up

General Description

Features

^zTwo step-up DC-DC Converters (CH1, CH2)

The RT9903B is a complete power-supply solution for

digital still cameras and other hand-held devices. It

integrates a high-efficiency fours step-up DC-DC

converters and a charge pump.

`HV Internal Switches

`50mA Load Current

^zOne Step-up DC-DC Converter (CH3)

`0.2V Reference Voltage

The two Step-up DC-DC converters (CH1,CH2) accept

inputs from 1.5V to 5.5V and regulate a resistor-

adjustable output up to 17V. One Step-up DC-DC

converter (CH3) can be regarded as white LED Driver,

which reference voltage is 0.2V and have OVP function.

One step-upDC-DC converter (CH4) regulate a resistor-

adjustable output up 5V. An adjustable operating

frequency (up to 1.4MHz) is utilized to get optimum size,

cost, and efficiency.

`HV Internal Switches

`LED Brightness Dimming Control

`Over Voltage Protection

^zOne Step-up DC-DC Converter (CH4)

`External Switches

`External Current Limit Setting

^zUp to 1.4MHz Switching Frequency

z 1μA Supply Current in Shutdown Mode

z External Compensation Network for All Converters

z Programmable Soft Start Function (CH1, CH2, CH3,

CH4)

RT9903B is available in VQFN-24L 4x4 package. Each

DC-DC converters have independent shutdown inputs.

z Independent Enable Pin to Shutdown Each

Channel

Applications

z 24-Lead VQFN Package

z Digital Still Camera

z RoHS Compliant and 100% Lead (Pb)-Free

z PDAs

z PortableDevice

Pin Configurations

Ordering Information

(TOP VIEW)

RT9903B

Package Type

QV : VQFN-24L 4x4 (V-Type)

Operating Temperature Range

P : Pb Free with Commercial Standard

G : Green (Halogen Free with Commer-

cial Standard)

24 23 22 21 20 19

PGND

LX1

VDD

PGND

EN4

EN2

EN1

GND

Note :

Richtek Pb-free and Green products are :

`RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

EXT4

CS4

10 11 12

`Suitable for use in SnPb or Pb-free soldering processes.

`100% matte tin (Sn) plating.

VQFN-24L 4x4

Marking Information

For marking information, contact our sales representative

directly or through a Richtek distributor located in your

area, otherwise visit our website for detail.

DS9903B-07 August 2007

www.richtek.com

12 3 4 5 6 7...15

中文翻译

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与RT9903BPQV相关器件

型号	品牌	获取价格	描述	数据表
RT9903GQV	RICHTEK	获取价格	5 Channel DC/DC Converters IC with High-Efficiency Step-Up
RT9903PQV	RICHTEK	获取价格	5 Channel DC/DC Converters IC with High-Efficiency Step-Up
RT9907	RICHTEK	获取价格	3 Channel DC/DC Converters IC with High-Efficiency Step-Up and Step-Down
RT9907_11	RICHTEK	获取价格	3 Channel DC/DC Converters IC with High-Efficiency Step-Up and Step-Down
RT9907GQV	RICHTEK	获取价格	3 Channel DC/DC Converters IC with High-Efficiency Step-Up and Step-Down
RT9907PQV	RICHTEK	获取价格	3 Channel DC/DC Converters IC with High-Efficiency Step-Up and Step-Down
RT9911	RICHTEK	获取价格	6 Channel DC/DC Converters
RT9911_11	RICHTEK	获取价格	6 Channel DC/DC Converters
RT9911GQV	RICHTEK	获取价格	6 Channel DC/DC Converters
RT9911PQV	RICHTEK	获取价格	6 Channel DC/DC Converters

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