MIC2544A-1YM-TR

Overview

The MIC2544A-1YM-TR is a high-side power switch IC manufactured by Microchip Technology, designed for USB load switching applications. It features an N-channel output capable of handling up to 1.5A with a typical on-resistance of 80 milliohms. The device operates within a load voltage range of 2.7V to 5.5V and supports a programmable current limit adjustable from 100mA to 1.5A. Key protection mechanisms include adjustable current limiting and overtemperature shutdown. It utilizes a non-inverting open/switch interface and provides status flag outputs. The component is housed in an 8-SOIC package (0.154 inch width) and functions across a temperature range of -40°C to +85°C.

Feature Summary

• Integrates programmable current limiting and overtemperature protection for robust fault management
• Provides a status flag output to indicate operational state or fault conditions
• Features low on-resistance for efficient power distribution in high-side configurations

Applications

• USB port load switching and protection
• Peripheral power distribution in embedded systems
• High-side switching for bus-powered devices

Procurement Notes

Verify the specific suffix 'A' against the manufacturer's latest datasheet to confirm parameter updates compared to the base MIC2544 series. Ensure the SOIC-8 package dimensions match the PCB footprint requirements. Confirm RoHS3 compliance status if required by project specifications. Cross-reference the ordering number with official Microchip distributors to ensure availability of the tape-and-reel variant.

Selection Notes

Select this component when a single-channel high-side switch with adjustable current limits is required for USB or similar 5V bus architectures. Consider the 80mΩ on-resistance for thermal management calculations at full load. The non-inverting control interface simplifies logic integration. Evaluate the need for status flags versus simpler enable-only switches to determine if this feature set justifies the selection over basic alternatives.

Part Context

This part belongs to the MIC2544 family of power distribution switches. The 'A' designation typically indicates a specific revision or updated parameter set within the product line. It shares functional similarities with the MIC2544A-2YM-TR but differs in channel count and potentially pinout configuration. The TR suffix denotes tape-and-reel packaging suitable for automated assembly processes.

Replacement Considerations

MIC2544-1YM-TR serves as a direct alternative within the same family, though verification of parameter differences between the base and 'A' variants is necessary.