MCP73853T-I/ML

Overview

The MCP73853T-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, and reverse blocking protection within a 16-lead, 4x4 mm QFN package. The device offers high-accuracy voltage regulation with selectable options of 4.1V or 4.2V. It supports programmable charge currents compatible with USB specifications and includes safety timers, thermal regulation, and automatic power-down features.

Feature Summary

• Integrates pass transistor, current sensing, and reverse blocking protection
• Provides high-accuracy preset voltage regulation with selectable output levels
• Supports preconditioning of deeply depleted cells and automatic end-of-charge control
• Includes continuous cell temperature monitoring and direct LED drive outputs

Applications

• USB-powered portable electronic devices
• Single-cell lithium-ion battery charging systems
• Lithium-polymer battery management in space-limited applications
• Cost-sensitive consumer electronics requiring integrated charge management

Procurement Notes

Verify the specific suffix 'I/ML' corresponds to the industrial temperature range (-40°C to +85°C) and the 16-lead QFN packaging configuration. Confirm that the ordering part number matches the exact voltage regulation option required (4.1V or 4.2V) as defined by the manufacturer's selection matrix. Ensure compatibility with the intended PCB footprint for the specified package type.

Selection Notes

Select this component when a highly integrated solution for single-cell Li-Ion/Li-Po charging is required without external pass transistors. It is suitable for designs adhering to USB power bus specifications due to its compatible charge current settings. Consider the integrated temperature monitoring and fault outputs if direct LED indication is needed. Evaluate the 16-lead QFN package constraints against available board space.

Part Context

This device belongs to the MCP7385X family of USB-compatible charge management controllers manufactured by Microchip Technology. It shares core functionalities with the MCP73855 but distinguishes itself by including continuous cell temperature monitoring and additional status outputs. The family targets space-constrained, cost-sensitive applications requiring advanced linear charge management capabilities.

Replacement Considerations

The MCP73855 serves as a related variant within the same family, offering identical charge management features but excluding cell temperature monitoring and utilizing a smaller 10-lead DFN package. Direct substitution requires verifying package compatibility and confirming that the loss of temperature monitoring functionality does not impact system safety requirements.