MCP73837-FCI/UN

Overview

The MCP73837-FCI/UN is a single-cell lithium-ion or lithium-polymer charge management controller manufactured by Microchip Technology. It features automatic switching between USB and DC input power sources, supporting up to 1A from AC adapters and configurable currents from USB ports. The device operates within a supply voltage range of 3.75V to 6V and provides a regulated output of 4.2V at a maximum current of 1.2A. It is housed in a 10-pin MSOP package and functions reliably across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates automatic selection logic for dual power inputs, seamlessly switching between USB and DC sources without manual intervention.
• Provides comprehensive on-chip safety mechanisms designed to ensure secure charging operations for sensitive battery chemistries.
• Utilizes a compact 10-pin MSOP footprint to facilitate space-constrained printed circuit board layouts.

Applications

• Portable electronic devices requiring integrated single-cell battery charging solutions
• USB-powered consumer electronics with lithium-based power sources
• Industrial equipment utilizing lithium-ion or lithium-polymer batteries

Procurement Notes

Verify the specific suffix codes against official Microchip documentation to confirm pinout compatibility and thermal performance characteristics. Ensure that the selected variant matches the required operating temperature range and packaging style for your specific application environment. Cross-reference datasheet revisions to maintain design consistency.

Selection Notes

Select this component when designing systems requiring automatic source detection between USB and external DC supplies. It is suitable for applications needing high-current charging capabilities within a small form factor. Consider the MSOP package constraints and thermal dissipation requirements relative to the expected load conditions.

Part Context

This part belongs to the MCP7383x family of charge management controllers, which are engineered for single-cell lithium batteries. The series emphasizes integration and safety, offering manufacturers a robust solution for portable power management. The FCI/UN designation indicates the specific package type and commercial/industrial grade classification.

Replacement Considerations

Consult official substitution guides for compatible alternatives such as the MCP73838-FCI/UN, which shares similar electrical characteristics but may differ in specific pin configurations or thermal ratings. Verify functional equivalence before implementation.