MCP73853-I/ML

Overview

The MCP73853-I/ML is a linear charge management controller designed for single-cell lithium-ion and lithium-polymer batteries. It integrates a pass transistor, current sense amplifier, and reverse blocking protection within a 16-lead, 4x4 mm QFN package. The device supports USB-compatible charging profiles with programmable charge current settings and high-accuracy voltage regulation options of 4.1V or 4.2V. It features automatic end-of-charge control, preconditioning for deeply depleted cells, and thermal regulation to ensure safe operation across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates pass transistor and current sensing for compact design
• Provides USB-compatible charge current configuration
• Includes cell temperature monitoring and fault indication outputs

Applications

• Portable electronic devices requiring space-limited battery charging
• USB-powered consumer electronics
• Single-cell lithium-ion battery management systems

Procurement Notes

Verify the specific suffix 'I/ML' corresponds to the industrial temperature grade (-40°C to +85°C) and the 16-lead QFN package variant. Confirm that the ordering part number matches the exact voltage regulation option required (4.1V or 4.2V) if selectable via external components or internal configuration. Ensure compatibility with the target PCB footprint for the 4x4 mm QFN package before procurement.

Selection Notes

Select this component when a highly integrated solution for single-cell Li-Ion/Li-Polymer charging is needed in space-constrained applications. It is suitable for designs adhering to USB power bus specifications. Consider the MCP73855 if cell temperature monitoring is not required and a smaller 10-lead DFN package is preferred. Verify that the programmable charge current range meets the specific battery capacity requirements.

Part Context

The MCP73853 belongs to Microchip's MCP7385X series of advanced linear charge management controllers. This family is optimized for cost-sensitive and space-limited applications. The MCP73853 specifically offers comprehensive safety features including thermal regulation and safety timers, distinguishing it from simpler chargers by providing status and fault outputs for direct LED drive integration.

Replacement Considerations

The MCP73855 is a related device in the same family but lacks cell temperature monitoring and uses a 10-lead DFN package instead of the 16-lead QFN. Direct pin-to-pin replacement is not possible due to the package difference. Other MCP738xx series devices may offer similar functionality but require verification of package compatibility and feature sets.