General Description
The MAX1666 provides complete protection against overvoltage, undervoltage, overcharge current, overdischarge current, and cell mismatch for 2-cell to 4-cell lithium-ion (Li+) battery packs. The voltage of each cell in the battery pack is checked and compared to the programmable threshold and to the other cells in the pack.

FEATUREs
♦ Overvoltage Protection
    Programmable Limits from +4.0V to +4.4V
    Accurate to ±0.5%
♦ Undervoltage Protection
    Programmable Limits from +2.0V to +3.0V
    Accurate to ±2.5%
♦ Cell Mismatch Protection
    Programmable Limits from 0 to 500mV
    Accurate to ±10%
♦ Overcharge Current Protection
♦ Overdischarge Current Protection
♦ Low 30µA (typ) Operating Supply Current
♦ Low 1µA (max) Standby Current
♦ +28V (max) Input Voltage
♦ Available in Small 16-Pin QSOP (MAX1666S) and 20-Pin QSOP (MAX1666A/V/X) Packages

APPLICATIONs
    2/3/4-Cell Lithium-Ion Battery Pack