RT7247AHGSP datasheet(2/11 Pages) RICHTEK

2 / 11 page

RT7247AHGSP

Evaluation Board

UG7247AHGSP-00

July

2014

www.richtek.com

Introduction

General Product Information

General Description

The RT7247A is a high efficiency, monolithic synchronous step-down DC/DC converter that can deliver up to 2A

output current from a 4.5V to 18V input supply. The RT7247A'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 RT7247A also provides output 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 RT7247A is available in an SOP-8 (Exposed Pad) package.

Features

 ±1.5% High Accuracy Feedback Voltage

 4.5V to 18V Input Voltage Range

 2A 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

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