DESCRIPTION
The LTC®3566 is a highly integrated power management and battery charger IC for Li-Ion/Polymer battery applications. It includes a high efficiency current limited switching PowerPath manager with automatic load prioritization, a battery charger, an ideal diode, and a high effi ciency synchronous buck-boost switching regulator. Designed specifi cally for USB applications, the LTC3566’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.

FEATURES
POWER MANAGER
■ High Efficiency Switching PowerPathTM Controller with Bat-TrackTM 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 Effi ciency (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