MCP73871-2AAI/ML

Overview

The MCP73871-2AAI/ML is a fully integrated linear battery charger and power path management controller designed for single-cell lithium-ion or lithium-polymer batteries. It features an integrated N-channel MOSFET charge transistor, eliminating the need for external blocking diodes. The device supports input power from USB ports or AC-DC adapters, managing system load sharing to ensure continuous operation during charging. Key electrical parameters include a maximum charge current of 1.1A, a fixed 4.2V output voltage, and a 6V maximum supply voltage.

Feature Summary

• Integrated N-channel MOSFET charge transistor for high efficiency
• Automatic power path management with seamless system switchover
• Programmable charge current via a single resistor
• Thermal regulation to limit die temperature rise

Applications

• Portable consumer electronics requiring compact power solutions
• IoT sensor nodes and wireless communication devices
• Battery-powered medical instruments
• Handheld data terminals and mobile phones

Procurement Notes

Verify the specific suffix '2AAI' against official Microchip documentation to confirm terminal voltage settings and package details. Ensure compatibility with the target PCB footprint for the ML package. Confirm RoHS compliance status through the manufacturer's latest datasheet before finalizing procurement specifications.

Selection Notes

Select this component for applications requiring a small footprint and simplified bill of materials due to the integrated power switch. It is suitable for designs needing precise thermal management and automatic load switching between USB and adapter inputs without complex external circuitry.

Part Context

This part belongs to the MCP7387x family of highly integrated charge management controllers. These devices are optimized for space-limited portable applications, offering a complete solution for charging and power distribution in a single chip architecture.

Replacement Considerations

MCP73871T-1AAI/ML

FAQ

Does the MCP73871 require an external blocking diode?

No, the device includes an integrated N-channel MOSFET that acts as the charge transistor, removing the need for an external blocking diode.

How does the power path management function?

It automatically prioritizes the input source (USB or adapter) to power the system while simultaneously charging the battery, ensuring no interruption in system operation.