Richtek RT7247AHGSP, Руководство пользователя

Страница: 2 / 11

RT7247AHGSP
Evaluation Board
UG7247AHGSP-00 July 2014 www.richtek.com
2
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