General Description

The RT8280 is a high voltage buck converter that can support an input voltage range from 4.5V to 24V with output current up to 3A. Current mode operation provides fast transient response and eases loop stabilization.

The chip provides protection functions such as cycle-by cycle current limiting and thermal shutdown protection. In shutdown mode, the regulator only draws 25μA of supply current. The RT8280 is available in a SOP-8 (Exposed Pad) package.

Features

Wide Operating Input Range : 4.5V to 24V

Adjustable Output Voltage Range : 0.8V to 15V

Output Current up to 3A

25μA Low Shutdown Current

High Efficiency up to 90% at 2.2MHz

Programmable Frequency : 220kHz to 3MHz

Internal Soft-Start

Stable with Low ESR Output Ceramic Capacitors

Thermal Shutdown Protection

Cycle-By-Cycle Over Current Protection

RoHS Compliant and Halogen Free

Applications

DSL Modem for ADSL2+ Standard

Distributed Power Systems

Pre-Regulator for Linear Regulators