MCP73844T-820I/MS

Overview

The MCP73844T-820I/MS is a charge management controller designed for lithium-ion and lithium polymer batteries. It provides an output voltage of 8.2V with a maximum output current of 10 mA. The device operates on a supply voltage ranging from 4.5 V to 12 V. It is housed in an MSOP-8 surface-mount package and supports operation within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates a charge safety timer to terminate charging after a specified duration if the battery fails to reach full charge, preventing potential hazards from defective cells.

Applications

• Charging single-cell lithium-ion or lithium-polymer battery packs requiring low current
• Portable electronic devices utilizing dual-series cell configurations

Procurement Notes

Verify the specific suffix '820' confirms the 8.2V output setting, as this variant differs from standard 4.2V models. Confirm the 'T' designation indicates tape-and-reel packaging. Check manufacturer notifications for end-of-life status, as similar parts in this series have been discontinued. Ensure compatibility with the target application's input voltage range.

Selection Notes

Select this component when a fixed 8.2V charging profile is required for two series-connected cells. The integrated safety timer distinguishes it from basic chargers lacking termination logic. Verify that the 10 mA output current meets the capacity requirements of the target battery chemistry. Ensure the MSOP-8 footprint aligns with the PCB layout constraints.

Part Context

This part belongs to the MCP7384x family of charge management controllers. While many variants in this series are discontinued, specific reel-packaged versions remain active. It serves as a specialized solution for multi-cell series applications where precise voltage regulation and safety timing are critical.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Microchip Technology directly for current lifecycle status and approved alternatives.