The MCP73871-4CAI/ML is a Lithium-Ion Battery Charge Control and Management System from Microchip. It is a single-cell, 4.2 V Li-Ion/Li-Po battery charge controller with integrated pass-through power switch. Its features include constant-current/constant-voltage charge algorithm, a regulated constant current/constant voltage (CC/CV) charge cycle, a temperature-sensing thermal foldback loop, overvoltage protection, and overcurrent protection. The MCP73871-4CAI/ML also supports power path management and preconditioning, device wake-up from low-power sleep mode, output discharge, and charging from 5 V source. Additionally, the part is available in a 4 mm x 4 mm TQFN package.