System load sharing linear IC

The MCP73871 is a stand-alone system load sharing and Li-Ion/Li-Polymer battery charge management controller that features AC-DC wall adapter and USB port power sources selection. This device is also capable of autonomous power source selection between input or battery. It uses a constant current/constant voltage (CC/CV) charge algorithm with selectable charge termination point. The constant voltage regulation is fixed with four available options: 4.10V, 4.20V, 4.35V, or 4.40V.

Features:
Integrated System Load Sharing and Battery Charge Management
Simultaneously Power the System and Charge the Li-Ion Battery
Integrated Pass Transistors
Integrated Current Sense
Integrated Reverse Discharge Protection
Selectable Input Power Sources: USB Port or AC-DC Wall Adapter
Preset High Accuracy Charge Voltage Options:4.10V, 4.20V, 4.35V or 4.40V
±0.5% Regulation Tolerance
Maximum 1.8A Total Input Current Control
Resistor Programmable Fast Charge Current Control: 50 mA to 1A
Resistor Programmable Termination Set Point
Selectable USB Input Current Control: Absolute Maximum: 100 mA (L) / 500 mA (H)
Automatic Recharge
Automatic End-of-Charge Control
Safety Timer With Timer Enable/Disable Control
0.1C Preconditioning for Deeply Depleted Cells
Battery Cell Temperature Monitor
Undervoltage Lockout (UVLO)
Low Battery Status Indicator (LBO)
Power-Good Status Indicator (PG)
Charge Status and Fault Condition Indicator