Description
The FAN54010 family (FAN5401X) combines a highly integrated switch-mode charger, to minimize single-cell Lithiumion (Li-ion) charging time from a USB power source, and a boost regulator to power a USB peripheral from the battery.

Features
■ Fully Integrated, High-Efficiency Charger for Single-Cell Li-Ion and Li-Polymer Battery Packs
■ Faster Charging than Linear
■ Charge Voltage Accuracy: ±0.5% at 25°C ±1% from 0 to 125°C
■ ±5% Input Current Regulation Accuracy
■ ±5% Charge Current Regulation Accuracy
■ 20V Absolute Maximum Input Voltage
■ 6V Maximum Input Operating Voltage
■ 1.45A Maximum Charge Rate
■ Programmable through High-Speed I2C Interface (3.4Mb/s) with Fast Mode Plus Compatibility
    – Input Current
    – Fast-Charge / Termination Current
    – Charger Voltage
    – Termination Enable
■ 3MHz Synchronous Buck PWM Controller with Wide Duty Cycle Range
■ Small Footprint 1μH External Inductor
■ Safety Timer with Reset Control
■ 1.8V Regulated Output from VBUS for Auxiliary Circuits
■ Weak Input Sources Accommodated by Reducing Charging Current to Maintain Minimum VBUS Voltage
■ Low Reverse Leakage to Prevent Battery Drain to VBUS
■ 5V, 500mA Boost Mode for USB OTG for 3.0 to 4.5V Battery Input

Applications
■ Cell Phones, Smart Phones, PDAs
■ Tablet, Portable Media Players
■ Gaming Device, Digital Cameras