General Description
The MAX1501 intelligent, constant-current, constantvoltage (CCCV), temperature-regulated battery charger charges a single lithium-ion (Li+) cell or three-cell NiMH/NiCd batteries. The device integrates the currentsense resistor, PMOS pass element, and thermalregulation circuitry, while eliminating the reverseblocking Schottky diode to create the simplest charging solution for hand-held equipment.

FEATUREs
♦ Stand-Alone or Microprocessor-Controlled (µP) Linear 1-Cell Li+ or 3-Cell NiMH/NiCd Battery Charger
♦ No FET, Reverse-Blocking Diode, or CurrentSense Resistor Required
♦ 1.4A (max) Programmable Fast-Charge Current
♦ +95°C, +115°C, and +135°C Proprietary Programmable Die Temperature Regulation Control
♦ 4.5V to 13V Input Voltage Range with Input Overvoltage (OVLO) Protection Above 6.5V
♦ Programmable Top-Off Current Threshold: 10%, 20%, or 30% of the Fast-Charge Current
♦ Charge-Current Monitor for Fuel Gauging
♦ Programmable Safety Timer (3, 4.5, or 6 hours)
♦ Input Power Detection Output (ACOK) and Charge Enable Input (CHGEN)
♦ Automatic Recharge
♦ Digital Soft-Start Limits Inrush Current
♦ Charge Status Outputs for LEDs or µP Interface

APPLICATIONs
    Cellular and Cordless Phones
    PDAs
    Digital Cameras and MP3 Players
    USB Appliances
    Charging Cradles and Docks
    Bluetooth™ Equipment