MCP73871T-4CCI/ML

Overview

The MCP73871T-4CCI/ML is a fully integrated linear solution for system load sharing and lithium-ion or lithium-polymer battery charge management. It supports AC-DC wall adapter and USB port power sources with autonomous selection between input or battery. The device features constant current/constant voltage operation, thermal regulation, and reverse discharge protection. It includes an integrated pass transistor and current sense. The package is a 20-QFN (4x4) with exposed pad, suitable for surface mount installation.

Feature Summary

• Integrated system load sharing allows simultaneous powering of the system and charging of the Li-Ion battery
• Voltage proportional current control ensures system load priority over battery charge current
• Low-loss power-path management with ideal diode operation for seamless source switching
• Selectable input power sources including USB port or AC-DC wall adapter

Applications

• Portable applications requiring space-limited power management
• Systems utilizing AC-DC wall adapters as primary power sources
• USB-powered devices needing battery backup and load sharing
• IoT sensor nodes requiring uninterrupted system operation during charging

Procurement Notes

Verify the specific suffix '4CCI' corresponds to the required 4.40V charge voltage option before ordering. Confirm the ML package variant matches the PCB footprint requirements. Check manufacturer documentation for lead time updates as availability may vary by region. Ensure ESD handling procedures are followed due to the sensitive nature of the integrated circuit components.

Selection Notes

Select this component when both system load sharing and battery charging are required in a compact form factor. It is suitable for designs needing high accuracy charge voltage options up to 4.40V. Consider the 20-QFN package for space-constrained layouts. Verify that the maximum total input current of 1.8A meets the combined system load and charging requirements.

Part Context

This part belongs to the MCP73871 family of charge management controllers from Microchip Technology. These controllers are designed for highly integrated battery charge management in portable electronics. The series offers various voltage options and package types to accommodate different application needs while maintaining small physical sizes.

Replacement Considerations

MCP73871-1AAI/ML

FAQ

What is the charge voltage setting for the MCP73871T-4CCI/ML?

The '4CC' suffix indicates a preset high accuracy charge voltage option of 4.40V.

Does the MCP73871 support automatic power source selection?

Yes, it automatically selects power between the input source (AC-DC or USB) and the single-cell Li-Ion battery.