Datasheet > PMIC> RT9907

RT9907

更新时间： 2024-11-08 04:07:19

品牌	Logo	应用领域
立锜 - RICHTEK		转换器集成电源管理电路
页数	文件大小	规格书
19页	473K
描述
3 Channel DC/DC Converters IC with High-Efficiency Step-Up and Step-Down

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中文翻译

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技术参数
数据手册

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RT9907 技术参数

Status：	Active	Vin (min) (V)：	2.4
Vin (max) (V)：	5.5	Number of Channels：	3
Number of Buck Converters：	2	Number of Boost Converters：	1
Number of Negative Outputs：	0	Number of LED Drivers：	0
Number of LDO Regulators：	0	Features：	100% Duty Cycle;Enable Input;OCP;OVP;SCP;UVP
Package Type：	VQFN4x4-24

RT9907 数据手册

Preliminary

RT9907

3 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

^zMain step-up DC-DC Converter

`1.5V to 5.5V Adjustable Output Voltage

`Up to 90% Efficiency

The RT9907 is a three channel power-supply solution for

digital still cameras and other battery-powered devices. It

integrates an asynchronous step-up and two synchronous

step-downDC-DC converters. The RT9907 is targeted for

applications that use two AA cells or a single lithium-ion

battery.

`2.6A, 0.3Ω Internal Power Switch

^zTwo Step-Down DC-DC Converters

`0.8V to 5.5V Adjustable Output Voltage

`94% Efficiency

The threeDC-DC converters (CH1, CH2, CH3) accept input

voltage from 1.5V to 5.5V. Each DC-DC converter has

better transient response and excellent stability by

providing current-mode control and external compensation

network. With built-in Internal MOSFET and up to 1.4MHz

operating frequency, the RT9907 allows minimum BOM

cost and PCB area.

`100% Duty Cycle

^zUp to 1.4MHz Switching Frequency

^z1μA Supply Current in Shutdown Mode

^zProgrammable Soft Start Function

z Independent Enable Pin (CH1, CH2, CH3)

z External Compensation Network (CH1, CH2, CH3)

z Short Circuit Protection (CH1, CH2, CH3)

z Over Voltage Protection (CH2)

The step-downDC-DC converters (CH2, CH3) can regulate

output voltage as low as 0.8V. Three operational modes

are available: PWM, PSM, Low-Dropout modes. At PWM

mode, Internal synchronous rectifier with low R_DS(ON)

dramatically reduces conduction loss and achieve 94%

efficiency. It enters Low-Dropout mode when normal PWM

cannot provide regulated output voltage by continuously

turning on the upper P-MOSFET. No external Schottky

diode is required in practical application.

z 24-Lead VQFN Package

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

Applications

z Digital Still Camera

z PDAs

z PortableDevice

EachDC-DC converter has independent enable input and

soft-start function allowing versatile power sequence

combination. Complete protection functions are

implemented such as short circuit, over-voltage protection.

Pin Configurations

(TOP VIEW)

The RT9907 is available in small VQFN-24L 4x4 package.

Ordering Information

24 23 22 21 20 19

RT9907

COMP3

VDD3

LX3

EN1

ENM

VDD2

LX2

Package Type

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

GND

PGND3

Operating Temperature Range

P : Pb Free with Commercial Standard

G : Green (Halogen Free with Commer-

cial Standard)

PGND2

LX1

10 11 12

Note :

Richtek Pb-free and Green products are :

`RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

VQFN-24L 4x4

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

`100% matte tin (Sn) plating.

DS9907-07 August 2007

www.richtek.com

12 3 4 5 6 7...19

中文翻译

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与RT9907相关器件

型号	品牌	获取价格	描述	数据表
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
RT9912A	RICHTEK	获取价格	Multi-Channel Power Management IC for Portable Device
RT9917	RICHTEK	获取价格	7 Channel DC/DC Converters
RT9921	RICHTEK	获取价格	Integrated Multi-Channel DC/DC Converter for TFT LCD Panels

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