XC5011

The XC5011 is a complete constant current & constant voltage linear charger for single cell lithium-ion batteries. Its SOT package and low external component count make the XC5011 ideally suited for portable applications. Furthermore, the XC5011 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 MOSFET 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 XC5011 automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached. When the input supply (wall adapter or USB supply) is removed, the XC5011 automatically enters a low current state, dropping the battery drain current to less than 2uA. The XC5011 can be put into shutdown mode, reducing the supply current to 50uA. Other features include under-voltage lockout, automatic recharge and one status pin to indicate charge and charge termination.

Applications

• Wearable device
• Small capacity battery charger application
• Bluetooth, GPS Applications

Key features

• Programmable Charge Current Up to 200mA
• No MOSFET, Sense Resistor or Blocking Diode Required
• Complete Linear Charger in SOT Package for single Cell Lithium-Ion Batteries
• Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate Without Risk of Overheating
• Charges Single Cell Li-Ion Batteries Directly from USB Port
• Preset 4.2V Charge Voltage with ±1% Accuracy
• Charge Current Monitor Output for Gas Gauging
• Automatic Recharge
• C/10 Charge Termination
• 50uA Supply Current in Shutdown
• 2.9V Trickle Charge Threshold
• Soft-Start Limits Inrush Current
• ESD HBM 8KV
• Available in SOT23-5 Package