MCP73861T-I/ML

Overview

The MCP73861T-I/ML is a single-cell lithium-ion or lithium-polymer battery charge management controller manufactured by Microchip Technology. It integrates linear charging regulation, system load distribution, and battery status indication functions into a compact package. The device supports input voltages up to 5.5V and provides programmable charge current control via an external resistor. It features thermal regulation to reduce charge current during high-temperature operation and includes safety timers to terminate charging in case of abnormal conditions.

Feature Summary

• Integrates linear charge regulation with system load path management for efficient power distribution
• Includes thermal regulation circuitry to automatically adjust charge current based on die temperature
• Provides configurable charge termination options including constant voltage threshold and timer-based cutoff

Applications

• Portable electronic devices requiring single-cell lithium-ion battery charging
• Battery-powered consumer electronics with space-constrained designs
• Medical devices utilizing lithium polymer battery packs
• Industrial handheld instruments needing integrated power management

Procurement Notes

Verify component authenticity through authorized Microchip distributors or certified suppliers. Confirm the specific suffix matches the required operating temperature range and package variant. Request original manufacturer documentation to validate part history and ensure compliance with RoHS standards before integration into production systems.

Selection Notes

Evaluate the required charge current specifications against the external resistor selection capabilities. Ensure the input voltage source aligns with the device's maximum rating. Consider the thermal performance requirements of the application environment when selecting this controller for space-limited PCB layouts.

Part Context

This component belongs to the MCP73xx series of highly integrated battery charge management controllers designed for applications where board space is limited. The series offers various configurations for different battery chemistries and charging profiles, providing a complete solution for portable device power management without requiring external discrete components.

Replacement Considerations

Consult official Microchip documentation for verified cross-reference part numbers within the MCP73xx family. Ensure any substitute maintains compatibility with the existing PCB footprint and electrical interface requirements.