Description

The FAN8303 is a monolithic, non-synchronous, stepdown (buck) regulator with internal power MOSFETs. It achieves 2 A continuous output current over a wide input supply range with excellent load and line regulation. Current-mode operation provides fast transient response and eases loop stabilization. Fault condition protection includes cycle-by-cycle current limiting and thermal shutdown. The regulator draws less than 40 µA shutdown current. FAN8303 requires a minimum number of readily available standard external components.

Features

■ 2 A Output Current

■ 0.22 Ω Internal Power MOSFET Switch

■ Wide 5 V to 23 V Operating Input Range

■ Output Adjustable from 0.6 to 20 V

■ Stable with Low ESR Output Ceramic Capacitors

■ Up to 90 Efficiency

■ Less than 40 µA Shutdown Current

■ Fixed 370 kHz Frequency

■ Thermal Shutdown with Hysteresis

■ Cycle-by-Cycle Over-Current Protection

■ Available in 8-Pin SOIC Package

Applications

■ Set-Top Box

■ DSL and Cable Modems

■ Distributed Power Systems

■ Consumer Appliances (DVD)

■ Auxiliary supplies