USB PWR MNGR W/LI-ION/POLY CHGR & 3 BUCK
LTC3557EUF#PBF
Features
Seamless Transition Between Input Power Sources: Li-Ion Battery, USB, 5V Wall Adapter or High Voltage Buck Regulator with Bat-Track
200m§Ù Internal Ideal Diode Plus Optional External Ideal Diode Controller Provides Low Loss Power Path When Input Current is Limited or Unavailable
Triple Adjustable High Efficiency Step-Down Switching Regulators (600mA, 400mA, 400mA IOUT)
Pin Selectable Burst Mode Operation
Full Featured Li-Ion/Polymer Battery Charger
1.5A Maximum Charge Current with Thermal Limiting
Battery Float Voltage:
4.2V (LTC3557)
4.1V (LTC3557-1)
Low Profile 4mm x 4mm 28-Pin QFN Package