Datasheet > RT7249GQW

RT7249GQW

更新时间： 2022-02-26 13:29:52

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
17页	275K
描述
Synchronous Step-Down Converter

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RT7249GQW 数据手册

RT7249

3A, 18V Synchronous Step-Down Converter with

Adjustable Current Limited Power Switch

General Description

Features

^Buck Regulator

The RT7249 is a high efficiency, monolithic synchronous

step-downDC/DC converter with a power switch. The Buck

converter can deliver up to 3Aoutput current from 4.5V to

18V input supply. The RT7249's current-mode architecture

and external compensation allow the transient response

to be optimized over a wide input range and loads. Cycle-

by-cycle current limit provides protections against shorted

output and soft-start eliminates input current surge during

start-up. The RT7249 also provides under-voltage protection

and thermal shutdown. PWM frequency is adjustable by

the ROSC pin and Power Switch current limit can also be

adjusted by the RLIM pin. The low current (<3μA) in

shutdown mode provides output disconnection, enabling

easy power management in battery-powered systems. The

RT7249 is available in the WQFN-16L 4x4 package.

 4.5V to 18V Input Voltage Range

 3A Output Current

 Internal N-Channel MOSFETs

 Current Mode Control

 Adjustable PWM Frequency

 Adjustable Output from 0.8V to 15V

 Adjustable Soft-Start Time

 Stable with Ceramic Output Capacitors

 Cycle-by-cycle Current Limit

 Input Under-Voltage Lockout

^Output Under-Voltage Protection

^Thermal Shutdown

 Power Switch

^15% Current-Limit Accuracy at 1.2A

^Adjustable Current Limit : 75mA to 2580mA

^Meet USB Current-Limiting Requirements

^Reverse Input-Output Voltage Protection

^Built-in Soft-Start

Marking Information

1A= : Product Code

YMDNN : Date Code

1A=YM

^120mΩ High-Side MOSFET

^Operating Range : 2.5 V to 5.5 V

 RoHS Compliant and Halogen Free

DNN

Simplified Application Circuit

RT7249

OUT

VIN

BOOT

SW_IN

EN_SW

Enable

SW_OUT

COMP

RLIM

ROSC

PGND

is a registered trademark of Richtek Technology Corporation.

DS7249-02 March 2017

www.richtek.com

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