MCP73841T-420I/UN

Overview

The MCP73841T-420I/UN is a single-cell lithium-ion or lithium-polymer battery charge management controller manufactured by Microchip Technology. It operates within an input voltage range of 4.5 V to 5.5 V and provides a regulated output voltage of 4.2 V with a maximum output current of 1 A. The device is housed in a 10-pin MSOP package and supports surface mount installation. It functions across an industrial temperature range from -40°C to +85°C.

Feature Summary

• Integrates charge safety timer for enhanced protection
• Supports standard lithium-ion and lithium-polymer chemistries
• Includes thermal regulation capabilities

Applications

• Portable electronic devices requiring single-cell charging
• Consumer electronics with limited board space
• Battery-powered handheld instruments

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging configuration when sourcing. Confirm the 'I' designation aligns with required industrial temperature specifications. Ensure compatibility with existing PCB footprints for the MSOP-10 package before finalizing procurement orders.

Selection Notes

Select this component for designs requiring integrated charge termination and safety timers without external monitoring circuitry. It is suitable for applications where input voltage is strictly regulated between 4.5 V and 5.5 V. Consider alternative packages if higher current capacity or different thermal performance is required.

Part Context

This part belongs to the MCP7384x family of charge management controllers designed for portable applications. It shares functional similarities with other variants in the series but is distinguished by its specific output voltage setting and input voltage range constraints. The family focuses on simplifying battery charging implementation in compact form factors.

Replacement Considerations

Direct substitutes include MCP73841-420I/MS for identical electrical characteristics in an MSOP-8 package, or MCP73842T-420I/UN for dual-cell configurations. Verify pinout compatibility and thermal requirements when transitioning between these variants.