LTC3566

FEATURES POWER MANAGER ■ High Efficiency Switching PowerPath™ Controller with Bat-Track™ Adaptive Output Control ■ Programmable USB or Wall Input Current Limit (100mA/500mA/1A) ■ Full Featured Li-Ion/Polymer Battery Charger ■ Instant-On Operation with Discharged Battery ■ 1.5A Maximum Charge Current ■ Internal 180mΩ Ideal Diode Plus External Ideal Diode Controller Powers Load in Battery Mode ■ Low No-Load IQ when Powered from BAT (<30μA) 1A BUCK-BOOST DC/DC ■ High Efficiency (1A IOUT) ■ 2.25MHz Constant Frequency Operation ■ Low No-Load Quiescent Current (~13μA) ■ Zero Shutdown Current ■ Pin Control of All Functions APPLICATIONS ■ HDD Based MP3 Players, PDA, GPS, PMP Products ■ Other USB Based Handheld Products LTC3566/LTC3566-2 High Efficiency USB Power Manager Plus 1A Buck-Boost Converter DESCRIPTION The LTC®3566 family 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, a battery charger, an ideal diode, and a high efficiency synchronous buck-boost switching regulator. Designed specifically for USB applications, the LTC3566 family’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. The LTC3566 family’s switching input stage transmits nearly all of the 2.5W available from the USB port to the system load with mini...