The LTC4089-1 provides a fixed 5V output from the high voltage input to charge single cell Li-Ion batteries.

  • LTC4089

    LTC4089 - USB Power Manager with High Voltage Switching Charger
    Features
    • Seamless Transition Between Power Sources: Li-Ion Battery, USB, and 6V to 36V External Supply
    • High Efficiency 1.2A Charger from 6V to 36V Input with Adaptive Output Control (LTC4089)
    • Load Dependent Charging from USB Input Guarantees Current Compliance
    • 215mΩ Internal Ideal Diode plus Optional External Ideal Diode Controller Provides Low Loss Power Path When External Supply/USB Not Present
    • Constant-Current/Constant-Voltage Operation with Thermal Feedback to Maximize Charging Rate without Risk of Overheating
    • Selectable 100% or 20% Current Limit (e.g., 500mA/100mA) from USB Input
    • Preset 4.2V Charge Voltage with 0.8% Accuracy
    • C/10 Charge Current Detection Output
    • NTC Thermistor Input for Temperature Qualified Charging
    • Tiny (6mm × 3mm × 0.75mm) 22-Pin DFN Package