LTC2941-1

Features n Indicates Accumulated Battery Charge and Discharge n SMBus/I2C Interface n Integrated 50mΩ High Side Sense Resistor n ±1A Sense Current Range n High Accuracy Analog Integration n 1% Charge Accuracy 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 package Applications n Low Power Handheld Products n Cellular Phones n MP3 Player n Cameras n GPS LTC2941-1 1A I2C Battery Gas Gauge with Internal Sense Resistor Description The LTC®2941-1 measures battery charge state in batterypowered 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 an internal 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 LTC2941-1 features programmable high and low thresholds for accumulated charge. If a threshold is exceeded, the device communicates an alert using either the SMBus alert protocol or by setting a flag in the internal status register. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot Swap, ThinSOT and Bat-Track are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical Application CHARGER I2C/SMBus TO H...