MCP73871T-1CAI/ML

Overview

The MCP73871T-1CAI/ML is a highly integrated charge management controller designed for single-cell lithium-ion and lithium-polymer batteries. It supports USB and AC power sources with an input voltage range of 4.5V to 6V. The device provides a programmable charging current up to 1.1A and features a fixed 4.2V termination voltage. Integrated system load switch functionality allows simultaneous battery charging and system power supply. The component operates within a temperature range of -40°C to +85°C and is housed in a 20-pin QFN package measuring 4mm x 4mm.

Feature Summary

• Integrated linear charger with system load distribution capability
• Supports both USB and AC adapter input power sources
• Programmable constant-current charging profile
• Includes thermal regulation and charge status indication

Applications

• Portable consumer electronics requiring compact power solutions
• USB-powered devices with integrated battery backup
• Handheld instruments utilizing single-cell lithium batteries
• IoT edge devices with space-constrained PCB layouts

Procurement Notes

Verify the specific suffix '1CAI' against the official Microchip datasheet to confirm pinout compatibility and electrical characteristics. Ensure the 20-QFN package dimensions match the target footprint. Confirm RoHS compliance status for the specific manufacturing lot before integration into final assemblies.

Selection Notes

Select this component when a combined charger and load switch solution is required to minimize bill of materials. It is suitable for designs powered by standard USB or regulated AC adapters. Consider the 20-pin QFN package constraints during layout planning to ensure adequate thermal dissipation for high-current operation.

Part Context

This part belongs to the MCP73871 family of charge management controllers from Microchip Technology. The series is engineered for applications where board space is limited, offering a complete charging solution in a small form factor. It replaces discrete charging circuits by integrating protection and management functions into a single IC.

Replacement Considerations

MCP73871T-1AAI/ML

FAQ

What is the maximum supported charging current?

The device supports a programmable charging current up to 1.1A.

Does the IC support system load switching?

Yes, it integrates a system load switch that prioritizes system power while charging the battery.