Datasheet > RT7249

RT7249

更新时间： 2024-09-24 01:19:47

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

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

RT7249 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

12 3 4 5 6 7...17

中文翻译

下载PDF

与RT7249相关器件

型号	品牌	获取价格	描述	数据表
RT7249GQW	RICHTEK	获取价格	Synchronous Step-Down Converter
RT7250A	RICHTEK	获取价格	2A, 17V, 340/800kHz Synchronous Step-Down Converter
RT7250B	RICHTEK	获取价格	暂无描述
RT7251A	RICHTEK	获取价格	1.5A, 17V, 340/800kHz Synchronous Step-Down Converter
RT7251B	RICHTEK	获取价格	暂无描述
RT7252A	RICHTEK	获取价格	2A, 17V, 340/800kHz Synchronous Step-Down Converter
RT7252AZSP	RICHTEK	获取价格	IC REG BUCK ADJ 2A SYNC 8SOP
RT7252B	RICHTEK	获取价格	暂无描述
RT7252BZSP	RICHTEK	获取价格	IC REG BUCK ADJ 2A SYNC 8SOP
RT7253A	RICHTEK	获取价格	3A, 17V, 340kHz Synchronous Step-Down Converter