Datasheet > RT9902GQV

RT9902GQV

更新时间： 2024-11-08 04:07:19

品牌	Logo	应用领域
立锜 - RICHTEK		转换器
页数	文件大小	规格书
21页	514K
描述
4 Channel DC/DC Converters IC with High-Efficiency Step-Up and Step-Down

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RT9902GQV 数据手册

Preliminary

RT9902

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

and Step-Down

General Description

Features

^z1.5V to 5.5V Battery Input Voltage Range

The RT9902 is a complete power supply solution for digital

still cameras and other hand-held devices. It integrates a

high-efficiency main step-up DC-DC converter, two high-

efficiency step-down converters, a charge pump, and a

linear controller that drives an external P-MOSFET for linear

regulator. The RT9902 is targeted for applications that use

either two or three AA cells or a single lithiumion battery.

^zMain step-up DC-DC Converter

`1.5V to 5.5V Adjustable Output Voltage

`Up to 90% Efficiency

`2.6A, 0.3Ω Internal Power Switch

^zTwo Step-Down DC-DC Converters

`0.8V to 5.5V Adjustable Output Voltage

`94% Efficiency

The main step-up DC-DC converter accepts inputs from

1.5V to 5.5V and build in 2.6A Internal switch. The two

step-down DC-DC converters (CH2, CH3) accept inputs

from 1.5V to 5.5V and regulate a resistor adjustable

output from 0.8V to 5.5V. Each DC-DC converter has

independent shutdown input.

`100% Duty Cycle

^zStep-up Charge Pump for Micro-Controller

^zLinear Controller for Linear Regulator

^zUp to 1.4MHz Switching Frequency

^z1μA Supply Current in Shutdown Mode

^zProgrammable Soft Start Function

^zIndependent Enable Pin (CH1, CH2, CH3)

^zExternal Compensation Network (CH1, CH2, CH3)

^zShort Circuit Protection (CH1, CH2, CH3)

^zOver Voltage Protection (CH2)

The feature of the charge pump is to deliver few current

to micro-controller when the system operates in the

standby mode. RT9902 includes a linear controller with

0.8V reference voltage.An adjustable operating frequency

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

efficiency.

^z32-Lead VQFN Package

^zRoHS Compliant and 100% Lead (Pb)-Free

RT9902 is available in VQFN-32L 5x5 package.

Applications

z Digital Still Cameras

Ordering Information

z PDAs

RT9902

z PortableDevices

Package Type

QV : VQFN-32L 5x5 (V-Type)

Pin Configurations

Operating Temperature Range

P : Pb Free with Commercial Standard

G : Green (Halogen Free with Commer-

cial Standard)

(TOP VIEW)

32 31 30 29 28 27 26 25

Note :

VDD2

LX2

COMP3

VDD3

LX3

Richtek Pb-free and Green products are :

`RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

PGND3

LX2

GND

PGND2

LX1

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

`100% matte tin (Sn) plating.

GND

LX1

LDO_O

VDD1

10 11 12 13 14 15 16

VQFN-32L 5x5

DS9902-10 August 2007

www.richtek.com

12 3 4 5 6 7...21

中文翻译

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与RT9902GQV相关器件

型号	品牌	获取价格	描述	数据表
RT9902PQV	RICHTEK	获取价格	4 Channel DC/DC Converters IC with High-Efficiency Step-Up and Step-Down
RT9903	RICHTEK	获取价格	5 Channel DC/DC Converters IC with High-Efficiency Step-Up
RT9903B	RICHTEK	获取价格	4 Channel DC/DC Converters IC with High-Efficiency Step-Up
RT9903BGQV	RICHTEK	获取价格	4 Channel DC/DC Converters IC with High-Efficiency Step-Up
RT9903BPQV	RICHTEK	获取价格	4 Channel DC/DC Converters IC with High-Efficiency Step-Up
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

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