MCP73838T-FCI/UN

Overview

The MCP73838T-FCI/UN is a charge management controller designed for single-cell lithium-ion and lithium polymer batteries. It supports an input voltage range of 3.75 V to 6 V and delivers a maximum output current of 1.2 A. The device offers selectable charge termination voltages of 4.2 V, 4.35 V, 4.4 V, or 4.5 V. Operating within a temperature range of -40°C to +85°C, it utilizes a 10-pin MSOP package.

Feature Summary

• Integrates automatic switching between USB and DC power sources
• Configurable charge termination voltage selection via external resistors
• Includes thermal regulation to manage charging current based on die temperature

Applications

• Portable electronic devices requiring single-cell battery charging
• USB-powered consumer electronics
• Battery management systems for lithium-ion/polymer packs

Procurement Notes

Verify the specific suffix against official Microchip documentation to confirm the selected charge termination voltage (4.2V, 4.35V, 4.4V, or 4.5V). Ensure the MSOP-10 package matches your PCB footprint requirements. Confirm RoHS compliance status through the manufacturer's datasheet before finalizing procurement specifications.

Selection Notes

Select this component when a compact solution for single-cell Li-Ion/Polymer charging is required with support for multiple input sources. The fixed 1.2 A output current suits applications not exceeding this limit. Verify that the system design accommodates the specific termination voltage configuration defined by the part suffix.

Part Context

This part belongs to the MCP7383x family of charge management controllers from Microchip Technology. It shares functional similarities with the MCP73837 and MCP73833 but differs in package options and specific feature sets. The 'T' suffix indicates tape and reel packaging, while 'FCI/UN' denotes the specific pinout and voltage configuration.

Replacement Considerations

MCP73838T-FJI/UN: Alternative package variant (DFN vs MSOP) with identical electrical characteristics.