Datasheet > BuckConv> RT8272

RT8272

更新时间： 2024-11-12 11:46:31

品牌	Logo	应用领域
立锜 - RICHTEK		TI的电源Demo板
页数	文件大小	规格书
12页	225K
描述

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中文翻译

获取价格

技术参数
数据手册

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RT8272 技术参数

Status：	Active	Vin (min) (V)：	4.75
Vin (max) (V)：	24	Number of Outputs：	1
Vout (min) (V)：	0.92	Vout (max) (V)：	15
Preset Vout (V)：		Output Adj. Method：	Resistor
Iout (max) (A)：	3	Current Limit (typ) (A)：	4.1
Freq (typ) (kHz)：	1200	Freq (min) (kHz)：
Freq (max) (kHz)：		Ext Sync：	No
Ron_HS (typ) (mOhm)：	100	Ron_LS (typ) (mOhm)：
Iq (typ) (mA)：	0.8	Features：	Adjustable Soft-Start;Current Mode Control;Enable Input;Force PWM;OCP;Stable with Ceramic Capacitor;UVP
Package Type：	PSOP-8

RT8272 数据手册

RT8272

3A, 24V, 1.2MHz Step-Down Converter

General Description

Features

^zWide Operating Input Range : 4.75V to 24V

^zAdjustable Output Voltage Range : 0.92V to 15V

^zOutput Current up to 3A

The RT8272 is a high voltage buck converter that can

support the input voltage range from 4.75V to 24V and the

output current can be up to 3A. Current Mode operation

provides fast transient response and eases loop

stabilization.

^z25μA Low Shutdown Current

^zPower MOSFET : 0.1Ω

^zHigh Efficiency up to 95%

The chip provides protection functions such as cycle-by-

cycle current limiting and thermal shutdown protection.

In shutdown mode, the regulator draws 25μA of supply

current. The RT8272 is available in a SOP-8 (Exposed

Pad) surface mount package.

^z1.2MHz Fixed Switching Frequency

^zStable with Low ESR Output Ceramic Capacitors

^zThermal Shutdown Protection

^zCycle-By-Cycle Over Current Protection

^zRoHS Compliant and Halogen Free

Ordering Information

RT8272

Applications

z Distributive Power Systems

Package Type

SP : SOP-8 (Exposed Pad-Option 1)

z Battery Charger

z DSL Modems

Lead Plating System

z Pre-regulator for Linear Regulators

G : Green (Halogen Free and Pb Free)

Note :

Pin Configurations

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.

(TOP VIEW)

BOOT

VIN

GND

COMP

GND

SOP-8 (Exposed Pad)

Typical Application Circuit

VIN

BOOT

RT8272

10µF

4.75V to 24V

BOOT

10nF 4.7µH

OUT

Chip Enable

3.3V/3A

B330

25.8k

OUT

47µF

0.1µF

2.2nF 39k

9 (Exposed Pad)

10k

GND

COMP

DS8272-02 March 2011

www.richtek.com

12 3 4 5 6 7...12

中文翻译

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