Datasheet > BuckConv> RT7272A

RT7272A

更新时间： 2024-01-19 22:33:50

品牌	Logo	应用领域
立锜 - RICHTEK		转换器 TI的电源Demo板
页数	文件大小	规格书
14页	255K
描述
3A, 36V, 500kHz Synchronous Step-Down Converter

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技术参数
数据手册

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RT7272A 技术参数

Status：	Active	Vin (min) (V)：	4.5
Vin (max) (V)：	36	Number of Outputs：	1
Vout (min) (V)：	0.8	Vout (max) (V)：	30
Preset Vout (V)：		Output Adj. Method：	Resistor
Iout (max) (A)：	3	Current Limit (typ) (A)：	5.5
Freq (typ) (kHz)：	500	Freq (min) (kHz)：
Freq (max) (kHz)：		Ext Sync：	No
Ron_HS (typ) (mOhm)：	150	Ron_LS (typ) (mOhm)：	80
Iq (typ) (mA)：	0.9	Features：	Adjustable Current Limit;Current Mode Control;Enable Input;OCP;PSM;Stable with Ceramic Capacitor;UVP
Package Type：	PSOP-8	Datasheet：	https://datasheet5.oss-cn-shanghai.aliyuncs.com/datasheets/richtek/DS7272B-07.pdf

RT7272A 数据手册

RT7272A

3A, 36V, 500kHz Synchronous Step-Down Converter

General Description

Features

^z4.5V to 36V Input Voltage Range

The RT7272A is a high efficiency, current mode

synchronous step-downDC/DC converter that can deliver

up to 3A output current over a wide input voltage range

from 4.5V to 36V. The device integrates a 150mΩ high

side and a 80mΩ low side MOSFET to achieve high

conversion efficiency up to 95%. The current mode control

architecture supports fast transient response and simple

compensation circuit.

^z3A Output Current

^zInternal N-MOSFETs

^zCurrent Mode Control

^zFixed Frequency Operation : 500kHz

^zAdjustable Output Voltage from 0.8V to 30V

^zHigh Efficiency Up to 95%

^zStable with Low ESR Ceramic Output Capacitors

^zCycle-by-Cycle Current Limit

^zInput Under Voltage Lockout

^zOutput Under Voltage Protection

^zThermal Shutdown Protection

z Adjustable Current Limit

A cycle-by-cycle current limit function provides protection

against shorted output and an internal soft-start eliminates

input current surge during start-up. The RT7272A provides

complete protection functions such as input under voltage

lockout, output under voltage protection, over current

protection and thermal shutdown.

z RoHS Compliant and Halogen Free

The RT7272Ais available in the thermal enhanced SOP-8

(Exposed Pad) package.

Applications

z Distributed Power Systems

z Pre-Regulator for Linear Regulators

z Notebook Computers

Ordering Information

RT7272A

z Point of Load Regulator in Distributed Power System

z Digital Set-top Boxes

Package Type

SP : SOP-8 (Exposed Pad-Option 2)

z PersonalDigital Recorders

z Broadband Communications

z Flat Panel TVs and Monitors

z Vehicle Electronics

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.

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

Simplified Application Circuit

BOOT

RT7272A

VIN

OUT

RLIM

GND

OUT

COMP

is a registered trademark of Richtek Technology Corporation.

DS7272A-01 January 2013

www.richtek.com

12 3 4 5 6 7...14

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