MIC2545A-1YM

Overview

The MIC2545A-1YM is a single high-side power switch IC from Microchip Technology, designed for power distribution applications. It operates within a supply voltage range of 2.7 V to 5.5 V and supports an output current of up to 3 A. The device features a programmable current limit adjustable between 500 mA and 3 A, with a maximum on-resistance of 50 mΩ. Key timing specifications include a maximum turn-on time of 5 ms and a maximum blanking time of 25 µs. It functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Programmable current limiting capability allows customization of protection thresholds
• Integrated thermal shutdown protects the device against overheating conditions
• Active-high enable input provides straightforward logic control integration

Applications

• Power distribution in embedded systems
• USB port protection circuits
• Peripheral power switching in industrial controllers

Procurement Notes

Verify the specific suffix and tape-and-reel configuration when ordering. Confirm that the active-high enable polarity matches your system design. Ensure the thermal management strategy accounts for the package's dissipation characteristics under maximum load conditions. Cross-reference the datasheet revision to ensure compatibility with existing design files.

Selection Notes

Select this component when a single-channel high-side switch with adjustable current limiting is required. Compare the 50 mΩ on-resistance against alternative devices if lower conduction loss is critical. Verify that the 2.7 V minimum supply voltage aligns with your system's available rail. Consider the 8-pin SOIC package constraints for PCB layout and thermal relief requirements.

Part Context

This part belongs to the MIC2545 series of high-side switches. It shares functional similarities with the MIC2547 but offers a single output channel instead of dual channels. The device integrates protection features typical of Microchip's power management portfolio, focusing on reliability and ease of use in space-constrained applications.

Replacement Considerations

The MIC2547-1YM serves as a dual-channel alternative within the same family. Direct pin-to-pin replacements should be verified against official substitution lists. Ensure that any substitute maintains the 3 A current rating and compatible enable logic polarity.