Datasheet > RT7297B

RT7297B

更新时间： 2024-11-09 12:23:35

品牌	Logo	应用领域
立锜 - RICHTEK		转换器
页数	文件大小	规格书
14页	278K
描述
3A, 18V, 1.2MHz Synchronous Step-Down Converter

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RT7297B 数据手册

RT7297B

3A, 18V, 1.2MHz Synchronous Step-Down Converter

General Description

Features

ꢀ

1.5% High Accuracy Reference Voltage

The RT7297B is a high efficiency, monolithic synchronous

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

output current from a 4.5V to 18V input supply. The

RT7297B's current mode architecture and external

compensation allow the transient response to be

optimized over a wide input voltage range and loads. Cycle-

by-cycle current limit provides protection against shorted

outputs, and soft-start eliminates input current surge during

start-up. The RT7297B 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 RT7297B is available in

an SOP-8 (Exposed Pad) package.

^ꢀ4.5V to 18V Input Voltage Range

^ꢀ3A Output Current

^ꢀIntegrated N-MOSFET Switches

^ꢀCurrent Mode Control

^ꢀFixed Frequency Operation : 1.2MHz

^ꢀOutput Adjustable from 0.8V to 12V

^ꢀ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

RT7297B

Applications

ꢀ Wireless AP/Router

Package Type

ꢀ Set-Top-Box

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

ꢀ Industrial and Commercial Low Power Systems

ꢀ LCDMonitors and TVs

Lead Plating System

Z : ECO (Ecological Element with

Halogen Free and Pb free)

ꢀ Green Electronics/Appliances

ꢀ Point of Load Regulation of High-PerformanceDSPs

H : UVP Hiccup

L : UVP Latch-Off

Note :

Pin Configurations

Richtek products are :

(TOP VIEW)

` RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

BOOT

VIN

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

GND

COMP

GND

Marking Information

SOP-8 (Exposed Pad)

RT7297BxZSP : Product Number

RT7297Bx

ZSPYMDNN

x : H or L

YMDNN : Date Code

is a registered trademark of Richtek Technology Corporation.

DS7297B-02 September 2012

www.richtek.com

12 3 4 5 6 7...14

中文翻译

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