The MCP73811/2 devices are linear charge management controllers that are designed for use in space limited and cost sensitive applications. The MCP73811/2 provide specific charge algorithms for single cell Li-Ion or Li-Polymer battery to achieve optimal capacity in the shortest charging time possible. Along with its small physical size, the low number of external components required make the MCP73811/2 ideally suited for portable applications. For applications charging from a USB port, the MCP73811 adheres to all the specifications governing the USB power bus.

Pin out :

Features :

Complete Linear Charge Management Controller

• Integrated Pass Transistor
• Integrated Current Sense
• Integrated Reverse Discharge Protection
  • Constant Current / Constant Voltage Operation
  with Thermal Regulation
  • High Accuracy Preset Voltage Regulation: + 1%
  • Voltage Regulation: 4.20V
  • Selectable Charge Current:
• MCP73811: 85 mA / 450 mA
  • Programmable Charge Current:
• MCP73812: 50 mA – 500 mA
  • Minimum External Components Required:
• MCP73811: 2 Ceramic Capacitors
• MCP73812: 2 Ceramic Capacitors and
  1 Resistor
  • No Preconditioning
  • External End-of-Charge Control
  • Automatic Power-Down when Input Power
  Removed
  • Active High Charge Enable
  • Temperature Range:
• -40°C to +85°C
  • Packaging:
• 5-Lead SOT-23

Applications :

Low-Cost Lithium-Ion/Lithium-Polymer Battery
Chargers
• Rechargeable Toys
• Electronic Cigarettes
• Bluetooth Headsets
• USB Chargers

Application Circuit :