Datasheet > BuckConv> RT7251A

RT7251A

更新时间： 2024-01-22 18:44:15

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	241K
描述
1.5A, 17V, 340/800kHz Synchronous Step-Down Converter

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技术参数
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RT7251A 技术参数

Status：	Active	Vin (min) (V)：	4
Vin (max) (V)：	17	Number of Outputs：	1
Vout (min) (V)：	0.8	Vout (max) (V)：	12
Preset Vout (V)：		Output Adj. Method：	Resistor
Iout (max) (A)：	1.5	Current Limit (typ) (A)：	3
Freq (typ) (kHz)：	800	Freq (min) (kHz)：
Freq (max) (kHz)：		Ext Sync：	No
Ron_HS (typ) (mOhm)：	145	Ron_LS (typ) (mOhm)：	140
Iq (typ) (mA)：	0.6	Features：	Current Mode Control;Enable Input;Internal Compensation;OCP;OVP;PSM;Power Good;Stable with Ceramic Capacitor;UVP
Package Type：	WDFN2x2-8	Datasheet：	https://datasheet5.oss-cn-shanghai.aliyuncs.com/datasheets/richtek/DS7251AB-02.pdf

RT7251A 数据手册

RT7251A/B

1.5A, 17V, 340/800kHz Synchronous Step-Down Converter

General Description

Features

^z4V to 17V Input Voltage Range

The RT7251A/B is a high efficiency, monolithic

synchronous step-downDC/DC converter that can operate

at 340kHz/800kHz, while delivering up to 1.5A output

current from a 4V to 17V input supply. The RT7251A/B's

current mode architecture allows the transient response

to be optimized. Cycle-by-cycle current limit provides

protection against shorted outputs and soft-start eliminates

input current surge during start-up. Fault conditions also

include output under voltage protection, output over voltage

protection and thermal shutdown. The low current (<5μA)

shutdown mode provides output disconnection, enabling

easy power management in battery-powered systems. The

RT7251A/B is available in a WDFN-8L 2x2 package.

^z1.5A Output Current

^zInternal N-MOSFETs

^zCurrent Mode Control

^zFixed Frequency Operation : 340kHz/800kHz

^zOutput Adjustable from 0.8V to 12V

^zUp to 95% Efficiency

^zInternal Compensation

^zStable with Low ESR Ceramic Output Capacitors

^zCycle-by-Cycle Over Current Protection

^zInput Under Voltage Lockout

^zOutput Under Voltage Protection

z Output Over Voltage Protection

z Power Good Indicator

z Thermal Shutdown Protection

z RoHS Compliant and Halogen Free

Ordering Information

RT7251A/B

Package Type

QW : WDFN-8L 2x2 (W-Type)

Applications

z Industrial and Commercial Low Power Systems

Lead Plating System

Z : ECO (Ecological Element with

Halogen Free and Pb free)

z Computer Peripherals

z LCDMonitors and TVs

A : 340kHz

B : 800kHz

Note :

z Green Electronics/Appliances

z Point of Load Regulation for High-Performance DSPs,

FPGAs, and ASICs

Richtek products are :

` RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

Pin Configurations

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

(TOP VIEW)

VIN

BOOT

GND

PGOOD

Marking Information

RT7251AZQW

03 : Product Code

WDFN-8L 2x2

W : Date Code

03W

RT7251BZQW

70 : Product Code

W : Date Code

70W

is a registered trademark of Richtek Technology Corporation.

DS7251A/B-01 April 2012

www.richtek.com

12 3 4 5 6 7...14

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