LTC3586-3

LTC3586-2/LTC3586-3 FEATURES High Efficiency USB Power Manager with Boost, Buck-Boost and Dual Bucks DESCRIPTION Power Manager n High Efficiency Switching PowerPath™ Controller with Bat-Track™ Adaptive Output Control and Instant-On Operation n Programmable USB or Wall Current Limit (100mA/500mA/1A) n Full Featured Li-Ion/Polymer Battery Charger with Float Voltage of 4.2V (LTC3586-2) or 4.1V (LTC3586-3) with 1.5A Maximum Charge Current n Internal 180mΩ Ideal Diode Plus External Ideal Diode Controller Powers Load in Battery Mode n <30µA No-Load Quiescent Current when Powered from BAT DC/DCs n Dual High Efficiency Buck DC/DCs (400mA IOUT) n High Efficiency Buck-Boost DC/DC (1A IOUT) n High Efficiency Boost DC/DC (800mA IOUT) n DC/DC FAULT Output n Compact (4mm × 6mm) 38-Pin QFN Package APPLICATIONS n Portable Medical/Industrial Devices n Other USB-Based Handheld Products The LTC®3586-2/LTC3586-3 are highly integrated power management and battery charger ICs for Li-Ion/Polymer battery applications. They include a high efficiency current limited switching PowerPath manager with automatic load prioritization, battery charger, ideal diode, and four synchronous switching regulators (two bucks, one buckboost and one boost). Designed specifically for USB applications, the LTC3586-2/LTC3586-3’s switching power manager automatically limits input current to a maximum of either 100mA or 500mA for USB applications or 1A for adapter-powered applications. Unlike linear chargers, ...