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