MIC2039AYMT-TR

Overview

The MIC2039AYMT-TR is a high-side power distribution switch manufactured by Microchip Technology, housed in a 6-pin TDFN (2mm x 2mm) surface-mount package. It operates within an input voltage range of 2.5V to 5.5V and supports a maximum output current of 2.5A. The device features a typical on-resistance of 75mΩ at 5.0V and offers adjustable current limiting programmable from 0.2A to 2.5A via an external resistor. Key protection mechanisms include thermal shutdown and under-voltage lockout. The component includes a Kickstart feature for managing high inrush currents and provides an open-drain fault status flag with a 32ms delay.

Feature Summary

• High-accuracy current limiting with ±5% tolerance for reliable system protection
• Kickstart capability allows momentary high-current surges during startup or steady-state operation
• Integrated fault status flag with built-in delay asserts low during overcurrent or thermal events
• Programmable enable inputs support both active-high and active-low logic control

Applications

• Power distribution in embedded computing boards requiring sectioned high-current rails
• Remote medical devices and IoT equipment needing efficient power management
• Systems charging loads with high inrush currents such as large capacitors
• General-purpose high-side switching for portable electronic applications

Procurement Notes

Verify the specific suffix 'AYMT' corresponds to the 2mm x 2mm TDFN-6 package variant rather than the SOT-23-6 version. Confirm RoHS compliance status and check for recent Product Change Notifications regarding packaging or manufacturing site updates. Ensure the ordering quantity matches the standard reel configuration provided by the manufacturer.

Selection Notes

Select this component when precise current limiting accuracy is critical for system reliability. The adjustable limit range suits diverse load requirements without changing hardware topology. Consider the compact TDFN package for space-constrained designs. Evaluate the need for the Kickstart feature if the application involves significant capacitive loading during power-up sequences.

Part Context

This part belongs to the MIC2039 family of high-side MOSFET power switches originally developed by Micrel and acquired by Microchip. The family focuses on providing robust protection against overcurrent and thermal conditions while maintaining low quiescent current consumption. The AYMT variant specifically denotes the thin DFN package option within this product line.

Replacement Considerations

Direct substitutes include other MIC2039 variants with different packages such as MIC2039BYM6-TR for SOT-23-6 mounting. Cross-reference pinouts and electrical specifications carefully when replacing with generic high-side switches to ensure compatibility with existing control logic and protection thresholds.