MIC2545A-1YTS

Overview

The MIC2545A-1YTS is a single high-side power switch IC from Microchip Technology, designed for power distribution applications. It features an N-channel output capable of handling up to 500 mA continuous current with a programmable current limit range of 500 mA to 3 A. The device operates within a supply voltage range of 2.7 V to 5.5 V and exhibits a maximum on-resistance of 50 mΩ. Key timing parameters include a maximum turn-on time of 5 ms and a maximum idle time of 25 µs. It is housed in a 14-TSSOP surface-mount package and functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Programmable current limiting allows customization of protection thresholds between 500 mA and 3 A.
• Integrated high-side switching architecture simplifies load management in power distribution systems.
• Low on-resistance design minimizes power loss and thermal generation during conduction.

Applications

• USB port power switching and protection
• Peripheral power distribution in embedded systems
• Load switching for battery-powered devices

Procurement Notes

Verify the specific suffix 'YTS' corresponds to the 14-TSSOP package and tape-and-reel shipping configuration as indicated by distributor listings. Confirm that the 'TR' designation in related part numbers like MIC2545A-1YTS-TR aligns with your required packaging quantity. Ensure compatibility with the 2.7 V to 5.5 V supply range for your target application environment.

Selection Notes

Select this component when a single-channel high-side switch with adjustable current limits is required. It is suitable for applications needing precise overcurrent protection without external sensing resistors. Consider the 50 mΩ Rds(on) for efficiency requirements and the 14-TSSOP footprint for PCB layout constraints. Verify that the 5 ms turn-on time meets system startup specifications.

Part Context

This part belongs to the MIC2545A family of programmable current limit high-side switches. It serves as a direct replacement or upgrade for legacy Micrel-branded components in designs originally specifying Micrel Semiconductor parts. The transition from Micrel to Microchip Technology maintains functional equivalence for existing schematics utilizing the MIC2545A series.

Replacement Considerations

The MIC2545A-1YM is a documented equivalent variant within the same product family. Both parts share identical electrical characteristics and functionality, differing primarily in manufacturer branding history (Micrel vs. Microchip). Designers migrating from older Micrel inventory can utilize the MIC2545A-1YM as a verified substitute.