MCP73837-FJI/UN

Overview

The MCP73837-FJI/UN is a charge management controller designed for single-cell lithium-ion and lithium-polymer batteries. It features an integrated power path manager with automatic source selection between USB and DC inputs, prioritizing the system supply while charging the battery. The device supports a maximum output current of 1.2 A and regulates the battery voltage to 4.2 V. It operates within a supply voltage range of 3.75 V to 6 V and is housed in a DFN-10 package suitable for surface mount installation.

Feature Summary

• Integrates automatic input source switching between USB and DC power sources
• Manages power path distribution to prioritize system load over battery charging
• Supports standard charging profiles for single-cell lithium-ion and polymer chemistries

Applications

• Portable consumer electronics requiring compact power management
• USB-powered devices with integrated battery backup
• Mobile communication hardware
• Wearable technology platforms

Procurement Notes

Verify the specific suffix against official Microchip documentation to confirm pinout and thermal pad configuration. Ensure the procurement channel provides valid traceability for RoHS compliance. Confirm that the DFN-10 package handling requirements align with your assembly capabilities due to moisture sensitivity classifications.

Selection Notes

Select this component when automatic input source switching is required to simplify board design. It is appropriate for applications where space constraints favor a small DFN-10 footprint. Consider the 1.2 A output capability relative to the target battery capacity and desired charge time specifications.

Part Context

This part belongs to the MCP7383x series of battery chargers from Microchip Technology. The series focuses on integrating power path management with charge control functions. The FJI/UN designation specifies the particular package type and temperature rating variations within this product family.

Replacement Considerations

Consult official Microchip cross-reference lists for verified substitutes. Direct replacements must maintain identical pinouts and functional parameters. Generic equivalents may require schematic modifications.