LTC1960

FEATURES Complete Dual-Battery Charger/Selector System n Serial SPI Interface Allows External µC Control and Monitoring n Simultaneous Dual-Battery Discharge Extends Run Time by Typically 10% n Simultaneous Dual-Battery Charging Reduces Charging Time by Up to 50% n Automatic PowerPath™ Switching in <10µs Prevents Power Interruption n Circuit Breaker Protects Against Overcurrent Faults n 5% Accurate Adapter Current Limit Maximizes Charging Rate n 95% Efficient Synchronous Buck Charger n Charger Has Low 0.5V Dropout Voltage n No Audible Noise Generation, Even with Ceramic Capacitors n 11-Bit VDAC Delivers 0.8% Voltage Accuracy n 10-Bit IDAC Delivers 5% Current Accuracy n V Up to 32V; V IN BATT Up to 28V n Available in 5mm × 7mm 38-Pin QFN and 36-Pin Narrow SSOP Packages n LTC1960 Dual Battery Charger/ Selector with SPI Interface DESCRIPTION The LTC®1960 is a highly integrated battery charger and selector intended for portable products using dual smart batteries. A serial SPI interface allows an external microcontroller to control and monitor status of both batteries. A proprietary PowerPath architecture supports simultaneous charging or discharging of both batteries. Typical battery run times are extended by 10%, while charging times are reduced by up to 50%. The LTC1960 automatically switches between power sources in less than 10µs to prevent power interruption upon battery or wall adapter removal. The synchronous buck battery charger delivers 95% efficiency wit...