MCP73838-FJI/MF

Overview

The MCP73838-FJI/MF is a single-cell lithium-ion and lithium-polymer battery charge management controller manufactured by Microchip Technology. It supports USB or DC input with an integrated auto-switching mechanism. The device delivers a programmable output current up to 1.2 A and regulates the charging voltage to 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 reliably across a temperature range of -40°C to +85°C. The component is housed in a DFN-10 package.

Feature Summary

• Integrates an automatic power path manager to switch between USB and DC inputs without external control
• Provides full-featured constant-current/constant-voltage (CC/CV) lithium battery charging profile
• Includes thermal regulation to reduce charging current when die temperature reaches safe limits
• Offers status indicators for charge completion and fault conditions via dedicated pins

Applications

• Portable electronic devices powered by single-cell lithium batteries
• USB-powered consumer electronics requiring automated power source selection
• Battery backup systems for embedded controllers and sensors
• Mobile communication devices and handheld instruments

Procurement Notes

Verify the specific suffix configuration against the official Microchip datasheet to ensure compatibility with your required output voltage setting and package type. Confirm that the DFN-10 footprint matches your PCB layout constraints. Check for moisture sensitivity level requirements during storage and handling. Ensure the operating temperature range meets your environmental specifications before finalizing procurement.

Selection Notes

Select this component when designing systems that require seamless switching between multiple power sources for single-cell lithium batteries. It is suitable for applications needing precise voltage regulation options including 4.2 V, 4.35 V, 4.4 V, and 4.5 V. Consider its thermal management features for high-density designs. Verify that the 1.2 A output current capability aligns with your battery capacity and charging time requirements.

Part Context

This part belongs to the MCP7383x family of charge management controllers from Microchip Technology. It shares functional similarities with other members like the MCP73837 and MCP73833 but offers distinct pinout and feature configurations. The family is designed for portable applications requiring efficient and safe lithium battery charging solutions with minimal external component count.

Replacement Considerations

Potential substitutes include the MCP73838T-FJI/UN for reel packaging variants or the MCP73838-FCI/UN in MSOP packages. Verify electrical parameters and pin compatibility before substitution. Cross-reference with MCP73837 series parts if different input switching logic is acceptable.