General Description
The MAX1879 single-cell lithium-ion (Li+) battery charger utilizes an efficient pulse-charging architecture to minimize power dissipation in portable devices. This architecture combines the efficiency of switch-mode chargers with the simplicity and low cost of linear chargers. This simple device, in conjunction with a current-limited wall cube and a PMOS transistor, allows safe and fast charging of a single Li+ cell.

Features
♦ Simple Design Minimizes Heat
♦ Low Component Count, No Inductor
♦ Battery-Full Indicator
♦ 0.75% Accurate Battery Regulation
♦ 1.5µA (max) Battery Current Drain with Wall Cube Removed
♦ Restart Charging at 4.0V
♦ Continuous Overvoltage and Overtemperature Protection
♦ Safely Precharges Near-Dead Cells
♦ Automatic Power-Down when Power Source is Removed
♦ Charges 1 Cell from as Low as 4.5V
♦ Pin-Compatible Upgrade to MAX1679

Applications
    Single-Cell Li+ Powered Portables
    Self-Charging Battery Packs
    PDAs
    Cell Phones
    Cradle Chargers