MCP73837T-FCI/MF

Overview

The MCP73837T-FCI/MF is a highly integrated linear charge management controller designed for single-cell lithium-ion or lithium-polymer batteries. It features autonomous power source selection between AC adapters and USB ports, eliminating the need for external logic. The device operates within an input voltage range of 3.75 V to 6 V and supports output currents up to 1.2 A. It provides a precise 4.2 V charging voltage and includes thermal regulation to manage heat dissipation during high-current charging cycles.

Feature Summary

• Autonomous selection between AC adapter and USB port power sources without external control
• Integrated thermal regulation to reduce charging current when die temperature exceeds safe limits
• Highly integrated design minimizing external component count for space-constrained applications

Applications

• Single-cell lithium-ion battery charging in portable consumer electronics
• Power management for mobile communication devices
• Charging solutions for compact IoT sensors and wearables

Procurement Notes

Verify the suffix MF indicates the DFN EP package variant distinct from UN. Confirm RoHS compliance status via the manufacturer's certificate. Ensure the reel packaging matches production requirements. Cross-reference the full part number against official Microchip databases to validate availability and revision levels before procurement.

Selection Notes

Select this component when autonomous source switching between USB and DC inputs is required. It is suitable for designs needing integrated thermal protection to prevent overheating. Choose this controller for single-cell Li-Ion or Li-Polymer applications requiring a compact footprint with minimal external components compared to discrete solutions.

Part Context

This part belongs to the MCP73837 family of advanced standalone charge management controllers. It shares functional similarities with other Microchip battery chargers but is distinguished by its specific package configuration and autonomous switching capabilities. The family targets applications requiring reliable, low-component-count charging solutions for portable devices.

Replacement Considerations

Direct substitutes include MCP73837T-FCI/UN for identical functionality in a different MSOP-10 package. Verify pin compatibility and thermal performance when substituting packages. Other family members may require circuit adjustments due to differing feature sets or pinouts.