LTC4085
FEATURES
USB Power Manager with Ideal Diode Controller and
Li-Ion Charger
DESCRIPTION n Seamless Transition Between Input Power Sources: Li-Ion Battery, USB and 5V Wall Adapter n 215mΩ Internal Ideal Diode Plus Optional External Ideal Diode Controller Provide Low Loss Power Path™ When Wall Adapter/USB Input Not Present n Load Dependent Charging Guarantees Accurate USB Input Current pliance n Constant-Current/Constant-Voltage Operation with Thermal Feedback to Maximize Charging Rate Without Risk of Overheating- n Selectable 100% or 20% Input Current Limit (e.g., 500m A/100m A) n Battery Charge Current Independently Programmable Up to 1.2A n Preset 4.2V Charge Voltage with 0.8% Accuracy n C/10 Charge Current Detection Output n NTC Thermistor Input for Temperature Qualified Charging n Tiny (4mm × 3mm × 0.75mm) 14-Lead DFN Package
APPLICATIONS n Portable USB Devices: Cameras, MP3 Players, PDAs
The LTC®4085 is a USB power manager and Li-Ion battery charger designed for portable...
