MIC2545A-2YM

Overview

The MIC2545A-2YM is a single-channel high-side power switch IC from Microchip Technology, designed for USB and general power distribution applications. It operates within a supply voltage range of 2.7 V to 5.5 V and supports an output current up to 500 mA with a programmable current limit adjustable between 500 mA and 3 A. The device features a maximum on-resistance of 50 mΩ, ensuring low conduction losses. Key timing parameters include a maximum turn-on time of 5 ms and a maximum blanking time of 25 µs. It is housed in an 8-pin SOIC package and functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates programmable current limiting to protect downstream loads from overcurrent conditions
• Features low on-resistance for efficient power delivery in high-side switching configurations
• Includes built-in blanking time to prevent false triggering during load connection transients

Applications

• USB port power management and protection
• ACPI-compliant power distribution systems
• General-purpose DC power switching and distribution

Procurement Notes

Verify the specific suffix against official Microchip documentation to confirm package type and tape-and-reel specifications. Ensure the selected variant matches the required current limit programming configuration and thermal performance for the intended application environment.

Selection Notes

Select this component when a single-channel high-side switch with programmable current limits is required for 5V logic-level applications. Consider the 50 mΩ on-resistance for efficiency needs and verify that the 500 mA to 3 A programmable range covers the load requirements.

Part Context

This part belongs to the MIC2545A family of integrated high-side power switches optimized for low-loss DC power switching. These devices are commonly used in power management circuits requiring precise control and protection of connected loads in consumer and industrial electronics.

Replacement Considerations

Check the MIC2545A-2YM-TR for reel-packaged equivalents. Verify pin compatibility and electrical characteristics against similar high-side switches from other manufacturers if sourcing constraints exist.