Datasheet Summary
LTC3557/LTC3557-1
USB Power Manager with Li-Ion Charger and Three
Step-Down Regulators
Features
- Seamless Transition Between Input Power Sources: Li-Ion Battery, USB, 5V Wall Adapter or High Voltage Buck Regulator with Bat-TrackTM
- 200mΩ 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 × 4mm...