Description

The FAN5350 is a step-dow n sw itching voltage regulator that delivers a fixed 1.82V from an input voltage supply of 2.7V to 5.5V. Using a proprietary architecture w ith synchronous rectification, the FAN5350 is capable of delivering 600mA at over 90 efficiency, w hile maintaining a very high efficiency of over 80 at load currents as low as 1mA. The regulator operates at a nominal fixed frequency of 3MHz at full load, w hich reduces the value of the external components to 1µH for the output inductor and 4.7µF for the output capacitor.

Features

■ 3MHz Fixed-Frequency Operation

■ 16µA Typical Quiescent Current

■ 600mA Output Current Capability

■ 2.7V to 5.5V Input Voltage Range

■ 1.82V Fixed Output Voltage

■ Synchronous Operation

■ Pow er-Save Mode

■ Soft-Start Capability

■ Input Under-Voltage Lockout (UVLO)

■ Thermal Shutdow n and Overload Protection

■ 6-Lead 3 x 3mm MLP

■ 5-Bump 1 x 1.37mm WLCSP

Applications

■ Cell Phones, Smart-Phones

■ Pocket PCs

■ WLAN DC-DC Converter Modules

■ PDA, DSC, PMP, and MP3 Players

■ Portable Hard Disk Drives