MCP73871T-2AAI/ML

Overview

The MCP73871T-2AAI/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 integrated pass transistors, current sense, and reverse discharge protection. It offers selectable input power sources and preset high-accuracy charge voltage options including 4.10V, 4.20V, 4.35V, or 4.40V with ±0.5% regulation tolerance. It operates in Constant Current/Constant Voltage mode with thermal regulation and maximum 1.8A total input current control. The package is a 20-QFN (4x4).

Feature Summary

• Integrated system load sharing and battery charge management allowing simultaneous system powering and battery charging.
• Voltage proportional current control ensures 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-limited battery charge management.
• Systems utilizing AC-DC wall adapter power sources.
• USB-powered portable devices requiring load sharing.
• Li-Ion and Li-Polymer battery charging systems.

Procurement Notes

Verify the specific suffix '2AAI' against the official Microchip datasheet to confirm the exact charge voltage setting and feature configuration. Ensure the 20-QFN package dimensions match the target PCB footprint. Check for any recent product discontinuation notices or lifecycle changes from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when a fully integrated solution for both system load sharing and battery charging is required. It is suitable for designs needing autonomous power source selection between USB and AC-DC adapters. Consider the 1.8A total input current limit and the specific charge voltage option corresponding to the '2AAI' suffix during circuit design.

Part Context

This part belongs to the MCP73871 family of charge management controllers from Microchip Technology. These controllers are designed for highly integrated battery solutions in portable electronics. The family supports various charge voltages and packages to accommodate different application constraints while maintaining low external component counts.

Replacement Considerations

MCP73871T-1AAI/ML

FAQ

What is the primary function of the MCP73871T-2AAI/ML?

It is a fully integrated linear solution for system load sharing and Li-Ion/Li-Polymer battery charge management with AC-DC wall adapter and USB port power sources selection.

Does the MCP73871T-2AAI/ML support simultaneous system powering and battery charging?

Yes, it features integrated system load sharing that allows simultaneously powering the system and charging the Li-Ion battery.