MIC2548A-1YM

Overview

The MIC2548A-1YM is a single-channel high-side power switch IC from the Microchip MIC2548 series, designed for load management applications. It features an N-channel output capable of handling up to 1.5 A continuous current with a maximum on-resistance of 1.1 Ω. The device supports a supply voltage range of 2.7 V to 5.5 V and includes programmable current limiting adjustable from 100 mA to 1.5 A. Key electrical parameters include a maximum run time of 5 ms and a maximum dwell time of 22 μs. It operates within a temperature range of -40°C to +85°C and is available in an 8-SOIC package.

Feature Summary

• Integrates programmable current limiting to protect loads from overcurrent conditions
• Features low static current consumption suitable for battery-powered systems
• Provides fast turn-on and turn-off times for efficient power switching
• Includes thermal shutdown protection to prevent damage during fault conditions

Applications

• Load switching in portable consumer electronics
• Power distribution in industrial control systems
• Battery management systems requiring low quiescent current
• Peripheral power enablement in embedded computing platforms

Procurement Notes

Verify the specific suffix (e.g., TR for tape and reel) against your assembly requirements, as packaging options may vary. Confirm that the 8-SOIC package dimensions align with your PCB footprint. Ensure the operating voltage range of 2.7 V to 5.5 V matches your system's rail specifications. Check for RoHS compliance status if required by your manufacturing standards. Cross-reference the datasheet revision date to ensure compatibility with your design timeline.

Selection Notes

Select this component when a single high-side switch with programmable current limit is required. It is suitable for applications needing low static current and moderate current capacity up to 1.5 A. Consider the 1.1 Ω on-resistance for power dissipation calculations. Evaluate the 2.7 V minimum supply voltage against your system's lowest operating condition. Compare thermal performance against alternative switches if high ambient temperatures are expected.

Part Context

The MIC2548A-1YM belongs to the MIC2548 family of power switch ICs, which are designed for versatile load switching applications. This family offers various channel configurations and current ratings to suit different power distribution needs. The MIC2548A variant specifically emphasizes low static current characteristics, making it distinct from higher-performance counterparts in the same series. It is manufactured by Microchip Technology, formerly Micrel Semiconductor.

Replacement Considerations

Direct substitutes may include other single-channel high-side switches from Microchip or competitors with similar current limits and package types. Verify pinout compatibility before substitution. Ensure equivalent current limiting ranges and on-resistance values. Check for matching supply voltage ranges and thermal protection features. Consult official replacement guides for cross-referencing valid alternatives.