MCP73871T-3CCI/ML

Overview

The MCP73871T-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 Voltage Proportional Current Control (VPCC) to prioritize system load over charging. Key electrical parameters include a maximum charge current of 1A, a total input current limit of 1.8A, and a preset charge voltage of 4.35V with ±0.5% regulation tolerance. It operates within a supply voltage range up to 6V and includes thermal regulation.

Feature Summary

• Integrated system load sharing and battery charge management with simultaneous powering and charging capabilities
• Voltage Proportional Current Control (VPCC) ensures system load priority over Li-Ion battery charge current
• Low-loss power-path management with ideal diode operation for efficient energy transfer
• Complete linear charge management controller with integrated pass transistors and reverse discharge protection

Applications

• Portable applications requiring space-limited designs
• Systems powered by AC-DC wall adapters or USB ports
• Single-cell Li-Ion or Li-Polymer battery management in portable electronics

Procurement Notes

Verify the specific suffix '3CCI' corresponds to the required 4.35V preset voltage option during procurement. Confirm package type is 20-QFN (4x4). Check datasheet for operating temperature range compliance (-40°C to +85°C). Ensure compatibility with USB specification current limits if used in USB-powered systems. Validate RoHS compliance status for your region.

Selection Notes

Select this component when system load sharing is critical alongside battery charging. Choose based on the required preset charge voltage; the '3' suffix indicates 4.35V. Consider the 20-QFN package for space-constrained PCB layouts. Verify that the 1A charge current and 1.8A total input current meet system demands. Ensure the application supports the integrated linear topology requirements.

Part Context

This part belongs to the MCP73871 family of charge management controllers from Microchip Technology. These devices are designed for highly integrated battery charge management in space-limited applications. The family offers various preset voltage options differentiated by suffix codes. The MCP73871 specifically addresses the need for seamless power source switching between USB and AC-DC inputs while managing battery health.

Replacement Considerations

MCP73871-3CCI/ML is a parameter-equivalent alternative. MCP73871T-1AAI/ML offers different voltage presets. MCP73871T-1CAI/ML provides another voltage option. Verify pinout and electrical specifications match before substitution.