General Description
The MAX1660 digitally controlled fuel-gauge interface executes two essential functions for rechargeable battery-pack management: fuel gauging and pack overcurrent protection. It accurately monitors a battery pack’s charge and discharge current flow, and records each using two independent, on-board Coulomb counters.

Features
♦ 1% Accuracy over a 600µA to 4A Current Range (RSENSE = 30mΩ)
♦ 5µV Input Offset Voltage (28µV max)
♦ SMBus 2-Wire (Plus Optional Interrupt) Serial Interface
♦ 2.00V Precision System Reference Output
♦ 3.3V Linear-Regulator Output Powers External Circuitry
♦ Two Micropower Shutdown Modes
♦ Independent 32-Bit Charge and Discharge Coulomb Counters
♦ Battery-Overcharge/Overdischarge Protection
♦ Battery Short-Circuit/Overcurrent Protection
♦ On-Board Power MOSFET Drivers
♦ 80µA Quiescent Current
♦ <1µA Shutdown Current
♦ Small 16-Pin QSOP Package (Same Board Area as 8-Pin SO)

Applications
    Smart-Battery Packs
    Battery-Pack Overcurrent Protection
    Industrial-Control System Interfaces
    Battery-Pack Fuel Gauging
    Digital Current-Sense Instrumentation
    Analog-to-Digital Conversion