MIC2548A-1YM-TR

Overview

The MIC2548A-1YM-TR is a single-channel high-side power distribution switch manufactured by Microchip Technology. It features an N-channel output capable of handling up to 1.5A load current with a maximum on-resistance of 120 mΩ. The device operates within a supply voltage range of 2.7V to 5.5V and supports programmable current limiting from 100mA to 1.5A. Key timing specifications include a maximum turn-on time of 5ms and a maximum off-time of 30µs. It is housed in an 8-SOIC surface-mount package and functions reliably across a temperature range of -40°C to +85°C.

Feature Summary

• High-side N-channel configuration optimized for USB power switching applications
• Programmable current limit allows precise control over load protection thresholds
• Integrated thermal shutdown and undervoltage lockout for enhanced system reliability

Applications

• USB hub power distribution
• Peripheral load switching
• Portable electronic device power management

Procurement Notes

Verify the complete part number including the suffix '-TR' to confirm tape-and-reel packaging, as indicated by distributor listings specifying factory pack quantities of 2500 units. Ensure the ordering information matches the specific SOIC-8 package variant required for your PCB layout. Cross-reference the datasheet revision date to confirm compatibility with your design requirements before finalizing procurement.

Selection Notes

Select this component when a single-channel high-side switch with programmable current limiting is required for low-voltage applications. The 1.5A capacity and 120 mΩ on-resistance make it suitable for driving moderate loads efficiently. Consider the 8-SOIC package constraints and the 2.7V to 5.5V operating range to ensure compatibility with your system's logic levels and power rails.

Part Context

This device belongs to the MIC2548 series of power switch ICs designed for power distribution. It serves as a load driver and protection element in systems requiring controlled power delivery. The series is characterized by its ability to manage current limits programmably, distinguishing it from fixed-limit switches in similar form factors.

Replacement Considerations

The MIC2544A-1YM-TR is a documented related part within the same manufacturer's portfolio, offering similar high-side switching functionality. Verify pinout compatibility and electrical parameter alignment, such as current limit ranges and on-resistance values, before substituting.