LTC4150 Datasheet | Linear Technology

Features n Indicates Charge Quantity and Polarity n ±50mV Sense Voltage Range n Precision Timer Capacitor or Crystal Not Required n 2.7V to 8.5V Operation n High Side Sense n 32.55Hz/V Charge Count Frequency n 1.5μA Shutdown Current n 10-Pin MSOP Package APPLICATIONS n Battery Chargers n Palmtop puters and PDAs n Cellular Telephones and Wireless Modems TYPICAL APPLICATION Coulomb Counter/ Battery Gas Gauge DESCRIPTION The LTC®4150 measures battery depletion and charging in handheld PC and portable product applications. The device monitors current through an external sense resistor between the battery’s positive terminal and the battery’s load or charger. A voltage-to-frequency...