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ME
800mA Lithium Ion Battery Linear Charger ME4055A
General Description Features
ME4055A is a complete constant-current/constant ●Protection of battery cell reverse connection
voltage linear charger for single cell lithium-ion ●No MOSFET sense resistor or blocking diode
batteries. Furthermore the ME4055A is specifically required
designed to work within USB power specifications. ●Complete Linear Charger in Thin SOT Package for
No external sense resistor is needed and no Single Cell Lithium-Ion Batteries
blocking diode is required due to the internal ●Constant- Current/Constant- Voltage operation with
PMOSFET architecture .Thermal feedback regulates thermal regulation to maximize Rate Without risk
the charge current to limit the die temperature during of overheating.
5
0
high power operation or high ambient ● Preset 4.2V charge voltage with ±1% accuracy
3
temperature .The charge voltage is fixed at 4.2V,and ● Automatic Recharge
3
1
the charge current can be programmed externally with ●Charges Single Cell Li-Ion Batteries Directly from
5
3
a single resistor. The ME4055A automatically 2USB Port
8 ●C/10 charge termination
terminates the charge cycle when the charge current
3
drops to 1/10th the programmed value after the final ● 55μA supply current in shutdown
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