Description
The FAN8303 is a monolithic, non-synchronous, stepdown (buck) regulator with internal power MOSFETs. It achieves 2A 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 40µA shutdown current. FAN8303 requires a minimum number of readily available standard external components.

Features
ƒ 2A Output Current
■ 0.22Ω Internal Power MOSFET Switch
■ Wide 5V to 23V Operating Input Range
■ Output Adjustable from 0.6 to 20V
■ Stable with Low ESR Output Ceramic Capacitors
■ Up to 90% Efficiency
■ Less than 40µA Shutdown Current
■ Fixed 370kHz 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