MIC2549A-1BM-TR

Overview

The MIC2549A-1BM-TR is a high-side power switch IC from Microchip Technology, designed for load distribution in low-voltage systems. It features an N-channel output capable of handling up to 3A continuous current with a maximum on-resistance of 50 mΩ. The device operates within a supply voltage range of 2.7V to 5.5V and includes programmable current limiting adjustable between 500mA and 3A. Key protection mechanisms include over-temperature latch functionality and thermal shutdown. The component is housed in an 8-SOIC package and supports surface-mount installation, operating reliably across temperatures from -40°C to +85°C.

Feature Summary

• High-side switching architecture with integrated N-channel MOSFET
• Programmable current limit ranging from 500mA to 3A
• Over-temperature latch protection for enhanced system safety
• Low on-resistance for efficient power delivery

Applications

• USB hub and peripheral power switching
• Audio equipment power distribution
• General-purpose electronic system load drivers
• Portable device power management circuits

Procurement Notes

Verify the specific suffix '1BM' against the official Microchip datasheet to confirm pinout and electrical characteristics match your design requirements. Ensure the 'TR' designation aligns with your required tape-and-reel packaging specifications. Cross-reference the manufacturer part number directly with Microchip Technology documentation to avoid confusion with similar variants or discontinued stock listed by third-party distributors.

Selection Notes

Select this component when a single-channel high-side switch with precise current limiting is required for 5V logic systems. The programmable current limit allows customization for different load profiles without external sensing resistors. Consider the 8-SOIC package size for space-constrained PCB layouts. Verify that the 50mΩ Rds(on) meets your efficiency targets for the expected load current.

Part Context

This part belongs to the MIC2549 series of power switches, which are optimized for USB and general-purpose load distribution applications. The MIC2549A variant typically offers improved performance characteristics compared to earlier generations. The '1BM' suffix denotes specific packaging and temperature rating configurations within the product line, while 'TR' indicates reel packaging for automated assembly.

Replacement Considerations

Publicly confirmed substitute part numbers for the MIC2549A-1BM-TR are not available in the provided source material. Users should consult Microchip Technology's official cross-reference tools or contact authorized distributors for verified alternatives. Direct replacements must match the 8-SOIC package, 3A current rating, and high-side switching topology.