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ME4064A

   ME4064A is a complete constant-current/constant voltage linear charger for single cell lithium-ion batteries. Furthermore the ME4064A is specifically designed to work within USB power specifications.
    No external sense resistor is needed and no blocking diode is required due to the internal PMOSFET architecture .Thermal feedback regulates the charge current to limit the die temperature during high  power  operation  or  high  ambient temperature ...
    When the input supply (wall adapter or USB supply)is removed the ME4064A automatically enters a low current state dropping the battery drain current to less than 2μA.The ME4064A can be put into shutdown mode reducing the supply current to 55μA.
    Other features include charge current monitor,undervoltage lockout, automatic recharge and a status.
    ME4064A General Description:
        ME4064A is a complete constant-current/constant voltage linear charger for single cell lithium-ion batteries. Furthermore the ME4064A is specifically designed to work within USB power specifications.
        No external sense resistor is needed and no blocking diode is required due to the internal PMOSFET architecture .Thermal feedback regulates the charge current to limit the die temperature during high  power  operation  or  high  ambient temperature .The charge voltage is fixed at 4.2V,and the charge current can be programmed externally with a single resistor. The ME4064A automatically terminates the charge cycle when the charge current drops to 1/10 th the programmed value after the final float voltage is reached.
        When the input supply (wall adapter or USB supply)is removed the ME4064A automatically enters a low current state dropping the battery drain current to less than 2μA.The ME4064A can be put into shutdown mode reducing the supply current to 55μA.
        Other features include charge current monitor,undervoltage lockout, automatic recharge and a status.

    ME4064A Features:
    Protection of battery cell reverse connection
    No MOSFET sense resistor or blocking diode required
    Complete Linear Charger in ThinSOT Package for Single Cell Lithium-Ion Batteries
    Constant-Current/Constant-Voltage operation with thermal regulation to maximize Rate Without risk of overheating.
    Preset 4.2V charge voltage with ±1% accuracy
    Automatic Recharge
    Charges Single Cell Li-Ion Batteries Directly from USB Port
    C/10 charge termination
    55μA supply current in shutdown
    2.9V trickle current charge threshold
    Soft-Start limits inrush current
    Charge Status Output Pin

    ME4064A Package:
    5-pin SOT23-5
    6-pin- DFN2*2-6L

    ME4064A Applications:
    Cellular Telephones, PDAs, MP3 Players
    Charging Docks and Cradles
    Bluetooth Applications

    ME4064A  Selection Guide:

    product series product description
    ME4064AM5G VFLOAT =4.2V;Package:SOT23-5
    ME4064AN6G VFLOAT =4.2V;Package:DFN2*2-6L

    ME4064A  Typical Application:


    ME4064A  Pin Configuration:

    ME4064A  Block Diagram:


    ME4064A功能框图:


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