MCP73871-3CCI/ML

Overview

The MCP73871-3CCI/ML is a fully integrated linear solution for system load sharing and Li-Ion/Li-Polymer battery charge management. It supports AC-DC wall adapter and USB port power sources with autonomous selection. The device features an integrated pass transistor, current sense, and reverse discharge protection. It offers selectable input power sources and preset high-accuracy charge voltage options of 4.10V, 4.20V, 4.35V, or 4.40V with ±0.5% regulation tolerance. It operates in Constant Current/Constant Voltage (CC/CV) mode with thermal regulation and maximum 1.8A total input current control.

Feature Summary

• Integrated system load sharing and battery charge management allowing simultaneous system powering and battery charging
• Voltage proportional current control ensuring system load priority over battery charge current
• Low-loss power-path management with ideal diode operation for efficient power routing
• Complete linear charge management controller with integrated pass transistors and reverse discharge protection

Applications

• Portable applications requiring space-constrained power solutions
• IoT sensor nodes needing seamless power transition between mains and battery
• Battery-powered devices utilizing AC-DC adapters or USB ports as primary inputs
• Systems requiring automatic power source selection between input and battery

Procurement Notes

Verify the specific suffix '3CCI' against official Microchip documentation to confirm the exact charge voltage setting and package variant. Ensure compatibility with required thermal management and external component values for the selected configuration. Cross-reference datasheet revisions to confirm pinout and electrical characteristics match design requirements before finalizing procurement.

Selection Notes

Select this component for applications requiring integrated load sharing and precise Li-Ion/Polymer charging. Consider the available voltage presets (4.10V, 4.20V, 4.35V, 4.40V) to match battery specifications. Evaluate the 1.8A total input current limit against peak system loads. Verify thermal performance under expected ambient conditions due to integrated thermal regulation features.

Part Context

The MCP73871 belongs to Microchip's charge management controller family designed for portable electronics. It addresses the need for compact, highly integrated power solutions that manage both system load and battery charging efficiently. The series supports various input sources and provides flexible voltage options to accommodate different battery chemistries and standards.

Replacement Considerations

Public confirmed substitute part numbers are not explicitly listed in the provided reference data. Consult Microchip's official product selector or authorized distributor databases for direct replacements or pin-compatible alternatives within the MCP738xx series.