Datasheet > RT7257E

RT7257E

更新时间： 2022-06-24 15:44:50

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
15页	225K
描述
3A, 17V, 340kHz Synchronous Step-Down Converter

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RT7257E 数据手册

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Preliminary

RT7257E

SacPower

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

General Description

Features

1.5% High Accuracy Feedback Voltage

The RT7257E is 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

RT7257E'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 RT7257E provides thermal

shutdown protection. The low current (<3μA) shutdown

mode provides output disconnection, enabling easy power

management in battery-powered systems. The RT7257E

is available in an SOP-8 (Exposed Pad) package.

^z4.5V to 17V Input Voltage Range

^z3A Output Current

^zIntegrated N-MOSFET Switches

^zCurrent Mode Control

^zFixed Frequency Operation : 340kHz

^zOutput Adjustable from 0.8V to 15V

^zUp to 95% Efficiency

^zProgrammable Soft-Start

^zStable with Low ESR Ceramic Output Capacitors

^zCycle-by-Cycle Over Current Protection

^zInput Under Voltage Lockout

^zThermal Shutdown Protection

^zRoHS Compliant and Halogen Free

Ordering Information

RT7257EN

Applications

^zWireless AP/Router

Package Type

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

^zSet-Top-Box

^zIndustrial and Commercial Low Power Systems

^zLCDMonitors and TVs

Lead Plating System

Z : ECO (Ecological Element with

Halogen Free and Pb free)

^zGreen Electronics/Appliances

^zPoint of Load Regulation of High-PerformanceDSPs

Note :

Richtek products are :

Pin Configurations

` 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.

(TOP VIEW)

BOOT

VIN

GND

COMP

GND

Marking Information

SOP-8 (Exposed Pad)

For marking information, contact our sales representative

directly or through a Richtek distributor located in your

area.

http//www.sacpower.net

E-mail:nikozhong@hotmail.com

0755-83983280

系人: 先生

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