MCP73862-I/MLG

Overview

The MCP73862-I/MLG is a fully integrated linear charge management controller designed for single-cell lithium-ion and lithium-polymer batteries. It supports an input voltage range of 4.25V to 5.5V, making it suitable for direct connection to USB power sources. The device features a programmable charging current up to 800mA and includes thermal regulation to reduce charging current when die temperature limits are reached. It implements standard CC/CV charging profiles with automatic termination.

Feature Summary

• Fully integrated linear charge management controller for single-cell Li-Ion/Li-Polymer batteries
• Supports direct connection to USB power supplies without external components
• Includes thermal regulation to protect against overheating during charging

Applications

• Portable electronic devices requiring USB-powered battery charging
• Single-cell lithium-ion battery management systems
• Consumer electronics with limited board space constraints

Procurement Notes

Verify the specific package marking and date code against Microchip's official documentation. Confirm that the component matches the exact part number MCP73862-I/MLG, as suffixes may indicate different temperature ranges or packaging options. Ensure authenticity through authorized distributors to avoid counterfeit parts affecting battery safety.

Selection Notes

Select this component for applications requiring a compact, low-component-count solution for single-cell lithium batteries. It is appropriate where USB connectivity is required and thermal management is critical. Consider the 16-QFN package size for PCB layout constraints and verify that the 800mA maximum current meets the target battery capacity requirements.

Part Context

This part belongs to Microchip's MCP738xx series of battery chargers. It is functionally similar to the MCP73861 but differs in specific integration levels and pin configurations. The 'I' suffix denotes the industrial temperature range, while 'MLG' indicates the 16-lead QFN package type.

Replacement Considerations

Publicly confirmed substitutes include the MCP73861T-I/MLG for single-cell applications with similar interface requirements. Verify compatibility regarding pinout and thermal characteristics before substitution.