MCP73871T-1AAI/ML

Overview

The MCP73871T-1AAI/ML is a highly integrated single-cell lithium-ion and lithium-polymer battery charge management controller manufactured by Microchip Technology. It supports USB and AC power sources with an operating voltage range of 4.5V to 12V. The device features a maximum programmable charging current of 1.1A and includes built-in system load management capabilities. It utilizes a 20-pin QFN package (4x4mm) and operates within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates linear charger, system load switch, and battery protection in a single solution
• Supports both USB and AC adapter input power sources
• Includes automatic recharge function triggered when battery voltage drops below threshold
• Provides thermal regulation to reduce charging current during high temperature conditions

Applications

• Portable consumer electronics requiring compact battery charging solutions
• USB-powered devices needing integrated power path management
• Battery-operated equipment utilizing single-cell lithium-ion or polymer batteries
• Space-constrained embedded systems requiring simplified bill of materials

Procurement Notes

Verify the specific suffix '1AAI' against official Microchip documentation to confirm pinout compatibility and electrical characteristics. Ensure the 20-QFN package dimensions match your PCB footprint design. Confirm that the component meets RoHS3 compliance requirements for your target market regulations before finalizing procurement plans.

Selection Notes

Select this component when a unified solution for charging and power distribution is required to minimize board space. It is suitable for designs powered by either USB or external AC adapters. Consider the 1.1A maximum current capability against your battery capacity requirements. Verify that the 20-pin QFN package is feasible for your manufacturing process and assembly capabilities.

Part Context

This part belongs to the MCP73xx series of charge management controllers from Microchip Technology. The series is designed for applications where space is limited and integration is preferred over discrete component solutions. These controllers typically combine charging logic with power path management to simplify system design for portable electronic devices.

Replacement Considerations

MCP73871-1AAI/ML

FAQ

What input voltage ranges are supported?

The device supports input voltages from 4.5V to 12V, accommodating both USB and AC adapter power sources.

Does the IC manage system loads during charging?

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