Datasheet > BuckConv> RT7253A

RT7253A

更新时间： 2024-02-16 22:14:30

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	192K
描述
3A, 17V, 340kHz Synchronous Step-Down Converter

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技术参数
数据手册

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RT7253A 技术参数

Status：	Active	Vin (min) (V)：	4.5
Vin (max) (V)：	17	Number of Outputs：	1
Vout (min) (V)：	0.8	Vout (max) (V)：	15
Preset Vout (V)：		Output Adj. Method：	Resistor
Iout (max) (A)：	3	Current Limit (typ) (A)：	5.1
Freq (typ) (kHz)：	340	Freq (min) (kHz)：
Freq (max) (kHz)：		Ext Sync：	No
Ron_HS (typ) (mOhm)：	120	Ron_LS (typ) (mOhm)：	120
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	Datasheet：	https://datasheet5.oss-cn-shanghai.aliyuncs.com/datasheets/richtek/DS7253A-02.pdf

RT7253A 数据手册

RT7253A

3A, 17V, 340kHz Synchronous Step-Down Converter

General Description

Features

ꢀ

1.5% High Accuracy Feedback Voltage

The RT7253Ais a high efficiency, monolithic synchronous

step-down DC/DC converter that can deliver up to 3A

output current from a 4.5V to 17V input supply. The

RT7253A's current mode architecture and external

compensation allow the transient response to be

optimized over a wide range of loads and output capacitors.

Cycle-by-cycle current limit provides protection against

shorted outputs and soft-start eliminates input current

surge during start-up. The RT7253A also provides under

voltage protection and thermal shutdown protection. The

low current (<3μA) shutdown mode provides output

disconnection, enabling easy power management in

battery-powered systems. The RT7253A is available in

an SOP-8 (Exposed Pad) package.

^ꢀ4.5V to 17V Input Voltage Range

^ꢀ3A Output Current

^ꢀIntegrated N-MOSFET Switches

^ꢀCurrent Mode Control

^ꢀFixed Frequency Operation : 340kHz

^ꢀOutput Adjustable from 0.8V to 15V

^ꢀUp to 95% Efficiency

^ꢀProgrammable Soft-Start

^ꢀStable with Low ESR Ceramic Output Capacitors

^ꢀCycle-by-Cycle Over Current Protection

^ꢀInput Under Voltage Lockout

ꢀ Output Under Voltage Protection

ꢀ Thermal Shutdown Protection

ꢀ RoHS Compliant and Halogen Free

Ordering Information

RT7253A

Applications

ꢀ Wireless AP/Router

Package Type

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

ꢀ Set-Top-Box

ꢀ Industrial and Commercial Low Power Systems

ꢀ LCDMonitors and TVs

Lead Plating System

G : Green (Halogen Free and Pb Free)

H : UVP Hiccup

L : UVP Latch-Off

Note :

ꢀ Green Electronics/Appliances

ꢀ Point of Load Regulation of High-PerformanceDSPs

Richtek products are :

Pin Configurations

` RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

(TOP VIEW)

BOOT

VIN

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

GND

COMP

GND

Marking Information

RT7253AGSP : Product Number

SOP-8 (Exposed Pad)

RT7253A

xGSPYMDNN

x : H or L

YMDNN : Date Code

DS7253A-02 March 2011

www.richtek.com

12 3 4 5 6 7...14

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