Datasheet > RT8223A

RT8223A

更新时间： 2024-02-23 05:05:58

品牌	Logo	应用领域
立锜 - RICHTEK		电脑控制器
页数	文件大小	规格书
26页	369K
描述
High Efficiency, Main Power Supply Controller for Notebook Computers

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中文翻译

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数据手册

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RT8223A 数据手册

RT8223A/B

High Efficiency, Main Power Supply Controller

for Notebook Computers

General Description

Features

^zWide Input Voltage Range 6V to 25V

^zDual Fixed 5V/3.3V Outputs or Adjustable from 2V

to 5.5V, 1.5% Accuracy

The RT8223A/B dual step-down, switch-mode power-

supply controller generates logic-supply voltages in

battery-powered systems. The RT8223A/B includes two

pulse-width modulation (PWM) controllers fixed at 5V/

3.3V or adjustable from 2V to 5.5V. This device also

features 2 linear regulators providing fixed 5V and 3.3V

outputs. The linear regulator each provides up to 70mA

output current with automatic linear-regulator bootstrapping

to the PWM outputs. The RT8223A/B includes on-board

power-up sequencing, the power good output, internal soft-

start, and internal soft-discharge output that prevents

negative voltages on shutdown.

^zFixed 3.3V and 5V LDO Output : 70mA

^z2V Reference Voltage 1% : 50μA

^zConstant ON-Time Control with 100ns Load Step

Response

^zFrequency Selectable via TONSEL Setting

^zR_DS(ON)Current Sensing and Programmable Current

Limit combined with Enable Control

^zSelectable PWM, DEM, or Ultrasonic Mode

^zInternal Soft-Start and Soft-Discharge

z High Efficiency up to 97%

Aconstant on-time PWM control scheme operates without

sense resistor and provides 100ns response to load

transients while maintaining a relatively constant switching

frequency. The unique ultrasonic mode maintains the

switching frequency above 25kHz, which eliminates noise

in audio applications. Other features include diode-

emulation mode (DEM), which maximizes efficiency in

light-load applications, and fixed-frequency PWM mode,

which reduces RF interference in sensitive application

z 5mW Quiescent Power Dissipation

z Thermal Shutdown

z RoHS Compliant and Halogen Free

Applications

z Notebook and Sub-Notebook Computers

z 3-Cell and 4-Cell Li+ Battery-PoweredDevices

Marking Information

Ordering Information

RT8223

For marking information, contact our sales representative

directly or through a Richtek distributor located in your

area.

Package Type

QW : WQFN-24L 4x4 (W-Type)

Lead Plating System

G : Green (Halogen Free and Pb Free)

Z : ECO (Ecological Element with

Halogen Free and Pb free)

Pin Function

A : Default

B : With ENC

Note :

Richtek products are :

` RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

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

DS8223A/B-04 April 2011

www.richtek.com

12 3 4 5 6 7...26

中文翻译

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与RT8223A相关器件

型号	品牌	获取价格	描述	数据表
RT8223L	RICHTEK	获取价格	High Efficiency, Main Power Supply Controller for Notebook Computer
RT8223LGQW	RICHTEK	获取价格	High Efficiency, Main Power Supply Controller for Notebook Computer
RT8223LZQW	RICHTEK	获取价格	High Efficiency, Main Power Supply Controller for Notebook Computer
RT8223M	RICHTEK	获取价格	High Efficiency, Main Power Supply Controller for Notebook Computer
RT8223MGQW	RICHTEK	获取价格	High Efficiency, Main Power Supply Controller for Notebook Computer
RT8223MZQW	RICHTEK	获取价格	High Efficiency, Main Power Supply Controller for Notebook Computer
RT8223N	RICHTEK	获取价格	High Efficiency, Main Power Supply Controller for Notebook Computer
RT8223P	RICHTEK	获取价格	High Efficiency, Main Power Supply Controller for Notebook Computer
RT8228B	RICHTEK	获取价格	暂无描述
RT8230A	RICHTEK	获取价格	暂无描述

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