MCP73838T-FJI/UN

Overview

The MCP73838T-FJI/UN is a single-cell lithium-ion or lithium-polymer battery charge management controller manufactured by Microchip Technology. It supports USB and DC input sources with automatic switching between them. The device provides an output current of 1200 mA and offers selectable output voltages of 4.2 V, 4.35 V, 4.4 V, or 4.5 V. It operates within a supply voltage range of 3.75 V to 6 V and functions across a temperature range of -40°C to +85°C. The component is housed in a 10-lead MSOP package.

Feature Summary

• Automatically switches between USB and DC power inputs for seamless charging continuity
• Configurable output voltage settings to accommodate various lithium cell chemistries
• Integrated thermal regulation to manage heat dissipation during high-current charging

Applications

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

Procurement Notes

Verify the specific suffix configuration against official datasheets to ensure correct pinout and electrical characteristics. Confirm that the MSOP-10 package matches your PCB footprint requirements. Cross-reference the manufacturing date code and RoHS compliance status with the supplier's certificate of conformity before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring automatic source selection between USB and external DC supplies. Ensure the application demands a maximum output current of 1200 mA and fits within the 3.75 V to 6 V input voltage window. Verify that the operating environment stays within the specified -40°C to +85°C temperature range for reliable performance.

Part Context

This part belongs to the MCP7383x family of charge management controllers from Microchip Technology. It is designed for single-cell lithium-based batteries and integrates standard charging algorithms. The T suffix indicates tape and reel packaging, while /UN denotes the specific commercial grade and package variant.

Replacement Considerations

MCP73838T-FJI/MF serves as a direct alternative with identical electrical specifications but utilizes a DFN-10 package instead of MSOP-10. Verify mechanical compatibility and thermal performance differences before substituting.