LTC2941

Features n Indicates Accumulated Battery Charge and Discharge n High Accuracy Analog Integration n High Side Sense n 1% Charge Accuracy n ±50mV Sense Voltage Range n SMBus/I2C Interface n Configurable Alert Output/Charge Complete Input n 2.7V to 5.5V Operating Range n Quiescent Current Less Than 100µA n Small 6-Pin 2mm × 3mm DFN and 8-Lead MSOP Packages Applications n Low Power Handheld Products n Cellular Phones n MP3 Player n Cameras n GPS LTC2941 Battery Gas Gauge with I2C Interface Description The LTC®2941 measures battery charge state in batterysupplied handheld PC and portable product applications. Its operating range is perfectly suited for single-cell Li-Ion batteries. A precision coulomb counter integrates current through a sense resistor between the battery’s positive terminal and the load or charger. The measured charge is stored in internal registers. An SMBus/I2C interface accesses and configures the device. The LTC2941 features programmable high and l...