MCP73871-3CAI/ML

Overview

The MCP73871-3CAI/ML is a fully integrated linear charge management controller designed for single-cell lithium-ion and lithium-polymer batteries. It supports system load sharing from AC-DC wall adapters or USB ports, featuring an integrated pass transistor and reverse discharge protection. The device offers selectable input power sources and preset high-accuracy charge voltage options, including 4.20V with ±0.5% regulation tolerance. It operates in constant current/constant voltage mode with thermal regulation and manages up to 1.8A total input current while adhering to USB specification limits.

Feature Summary

• Integrated system load sharing allows simultaneous powering of the system and charging of the battery via VPCC logic
• Complete linear charge management with integrated pass transistors and reverse discharge protection
• Supports autonomous power source selection between AC-DC adapter and USB port inputs

Applications

• Portable consumer electronics requiring seamless power path management
• IoT sensor nodes needing extended standby time and reliable charging
• Space-constrained portable devices utilizing USB or wall adapter power sources

Procurement Notes

Verify the specific suffix '3CAI' confirms the 4.20V preset voltage option and ML package variant. Ensure compatibility with the required PCB footprint for the 20-QFN package. Confirm that the selected revision matches the design-in requirements for thermal performance and regulatory compliance standards applicable to the target market.

Selection Notes

Select this component when a compact solution for load sharing and battery charging is required without external MOSFETs. The integrated pass transistor reduces bill of materials count. Choose the -3CAI suffix specifically for applications requiring a fixed 4.20V termination voltage. Consider the 20-QFN package dimensions for board space constraints.

Part Context

This part belongs to the MCP73871 family of charge management controllers from Microchip Technology. The family provides solutions for portable applications where space and component count are critical. The device integrates functions typically requiring multiple discrete components, simplifying the design process for engineers developing battery-powered systems.

Replacement Considerations

MCP73871-1AAI/ML

FAQ

What does the '3C' suffix indicate in the part number?

The '3C' suffix indicates a preset charge termination voltage of 4.20V.

Does the MCP73871 require external pass transistors?

No, the device features integrated pass transistors, eliminating the need for external components.