Datasheet > RT9971

RT9971

更新时间： 2024-11-11 01:20:35

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
22页	459K
描述
7 CH Power Management IC

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RT9971 数据手册

RT9971

7 CH Power Management IC

General Description

Features

l One Synchronous Step-Up or Step-Down

Selectable Convertor

The RT9971 is a complete power supply solution for digital

still cameras and other hand held devices. The RT9971 is

a multi-channel power management IC including two step-

upDC/DC converters, two step-downDC/DC converters,

one selectable step-up/step-downDC/DC converter, one

invertingDC/DC converter and one WLED driver.

l Support 2AA or Li-ion Battery Applications

l Preset On/Off Sequence

l 5 CHs with Internal Compensation

l All Power Switches Integrated

l Up to 95% Efficiency

The RT9971 is designed to fulfill the applications forDSC

just as follows :

l 100% (max) Duty Cycle for Step-Down Converter

l Adjustable Output Voltage

CH1 is a synchronous step-up output for motor or DSC

system I/O power

l LED PWM Dimming Control

l LED Open Protection

l Transformerless Inverting Converter for CCD

l Fixed 1MHz Switching Frequency at CH1 to CH7

l RTC_LDO/SW1 Selectable by CN Pin

l 40-Lead WQFN Package

CH2 is a selectable synchronous step-up/step-down

output for motor or DSC system I/O power

CH3 and CH4 are synchronous step-down outputs forDSP

core and memory power supply

l RoHS Compliant and Halogen Free

CH5 is a high voltage step-up output for CCD bias power

supply

Applications

CH6 is an inverting output for negative CCD bias power

supply

l Digital Still Camera

l PDA

l PortableDevice

CH7 is a high voltage step-up output for driving WLED

For the CH2, the step-up or step-down converter, operation

mode can be selected by the SEL pin. Among all CHs,

there are 5 CHs with the built-in internal compensation.

The RT9971 also provides a transformerless inverting

converter for supplying the CCD power. For the

synchronous step-up and step down converters, the

efficiency can be up to 95%. The IC provides load

disconnection for CH 1 and CH 5. The IC has selectable

RTC_LDO/SW1 that can be determined by the CN pin.

Ordering Information

RT9971

Package Type

QW : WQFN-40L 5x5 (W-Type)

Lead Plating System

G : Green (Halogen Free and Pb Free)

Note :

Richtek products are :

} RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

The RT9971 is able to support Li-ion and 2AA battery

applications. The RT9971 provides WLED open protection,

current limit, thermal shutdown protection, over voltage

and under voltage protection to achieve complete

protection. The RT9971 is available in WQFN-40L 5x5

package.

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

DS9971-01 April 2011

www.richtek.com

12 3 4 5 6 7...22

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与RT9971相关器件

型号	品牌	获取价格	描述	数据表
RT9971A	RICHTEK	获取价格	7-CH Power Management IC
RT9971GQW	RICHTEK	获取价格	7 CH Power Management IC
RT9986	RICHTEK	获取价格	7-CH DC/DC Converter for DSC
RT9986A	RICHTEK	获取价格	暂无描述
RT9991	RICHTEK	获取价格	Power Management IC for SSD
RT9992	RICHTEK	获取价格	5+2 CH DC/DC Converters for DV
RT9996	RICHTEK	获取价格	Power Management IC for SSD
RT9H301C	ISAHAYA	获取价格	Adjustable Precision Shunt Regulator
RT9H301P	ISAHAYA	获取价格	Adjustable Precision Shunt Regulator
RT9H301S	ISAHAYA	获取价格	Adjustable Precision Shunt Regulator

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