Description
The FAN4860 is a low-power boost regulator designed to provide a regulated 3.3 V, 5.0 V or 5.4 V output from a single cell Lithium or Li-Ion battery. Output voltage options are fixed at 3.3 V, 5.0 V, or 5.4 V with a guaranteed maximum load current of 200 mA at VIN=2.3 V and 300 mA at VIN=3.3 V. Input current in Shutdown Mode is less than 1 µA, which maximizes battery life.

Features
■ Operates with Few External Components: 1 μH Inductor and 0402 Case Size Input and Output Capacitors
■ Input Voltage Range from 2.3 V to 5.4 V
■ Fixed 3.3 V, 5.0 V, or 5.4 V Output Voltage Options
■ Maximum Load Current >150 mA at VIN=2.3 V
■ Maximum Load Current 300 mA at VIN=3.3 V, VOUT=5.4 V
■ Maximum Load Current 300 mA at VIN=3.3 V, VOUT=5.0 V
■ Maximum Load Current 300 mA at VIN=2.7 V, VOUT=3.3 V
■ Up to 92% Efficient
■ Low Operating Quiescent Current
■ True Load Disconnect During Shutdown
■ Variable On-time Pulse Frequency Modulation (PFM) with Light-Load Power-Saving Mode
■ Internal Synchronous Rectifier (No External Diode Needed)
■ Thermal Shutdown and Overload Protection
■ 6-Pin 2 x 2 mm UMLP
■ 6-Bump WLCSP, 0.4 mm Pitch

Applications
■ USB “On the Go” 5 V Supply
■ 5 V Supply – HDMI, H-Bridge Motor Drivers
■ Powering 3.3 V Core Rails
■ PDAs, Portable Media Players
■ Cell Phones, Smart Phones, Portable Instruments