MIC2549A-1YTS

Overview

The MIC2549A-1YTS is a programmable current-limit high-side switch manufactured by Microchip Technology. It features an N-channel output with a maximum on-resistance of 50 mΩ and supports an output current up to 500 mA, with current limits adjustable from 500 mA to 3 A. The device operates within a supply voltage range of 2.7 V to 5.5 V and functions across temperatures from -40°C to +85°C. Key electrical parameters include a maximum turn-on time of 5 ms and a maximum blanking time of 25 μs. It is housed in a 14-TSSOP package.

Feature Summary

• Programmable current limit capability for flexible load protection
• Integrated over-temperature latch for enhanced thermal safety
• Reverse current blocking functionality to prevent backflow
• Open-drain fault flag for system status monitoring

Applications

• USB port power distribution and switching
• High-side load driver applications
• Power distribution units (PDUs)
• Over-current protection circuits

Procurement Notes

Verify the specific ordering suffix 'YTS' against the manufacturer's official datasheet to confirm the tube packing media and temperature grade. Ensure the selected component matches the required 14-TSSOP package dimensions and lead configuration. Cross-reference the part number with the latest Microchip Technology documentation to validate RoHS compliance and availability status before finalizing procurement orders.

Selection Notes

Select this component when a high-side switch with precise programmable current limiting is required. It is suitable for applications needing reverse current blocking and thermal latch protection. Consider the 50 mΩ on-resistance for efficiency requirements and verify that the 2.7 V to 5.5 V operating voltage aligns with the system supply rails. Ensure the 14-TSSOP package fits the PCB layout constraints.

Part Context

This part belongs to the MIC2549A series of programmable current-limit high-side switches. It is designed for robust power management in portable and industrial electronics. The series emphasizes protection features like over-temperature latching and open-drain fault flags. It serves as a reliable solution for managing high-current loads while providing detailed status feedback to the host controller.

Replacement Considerations

Consult the Microchip Technology cross-reference guide for verified substitute part numbers. Ensure any replacement maintains the 14-TSSOP package and compatible electrical specifications. Verify that alternative components support the same programmable current limit range and thermal protection features.