DESCRIPTION
The LT®3653 is a monolithic current mode PWM step-down regulator with programmable output current limit. Typically, it is used with battery charger power path controllers to pre-regulate the output and optimize the battery charger effi ciency. Output current limit provides accurate control over system power dissipation.

FEATURES
■ Wide Input Range:
    – Operation from 7.5V to 30V
    – Overvoltage Lockout Protects Circuit Through 60V Transients
■ Operates with LTC Bat-Track™ Li-Ion Battery Chargers to Maximize Effi ciency
■ No Reverse Discharge Path from VOUT to VIN
■ Programmable Output Current Limit
■ Integrated BOOST Diode
■ Thermal Protection
■ Small Application Size
■ Thermally Enhanced 2mm × 3mm DFN Package

APPLICATIONS
■ Battery Powered Equipment
■ Portable USB Devices – Cameras, MP3 Players, PDAs
■ Automotive Battery Regulation
■ Multiple-Source Battery Chargers