MIC2545A-2YTS

Overview

The MIC2545A-2YTS is a single high-side power switch IC from Microchip Technology, housed in a 14-pin TSSOP package. It operates within a supply voltage range of 2.7V to 5.5V and supports output currents up to 3A with a programmable current limit. The device features a maximum on-resistance of 50mΩ and includes thermal shutdown protection. It is designed for low-loss DC power switching applications.

Feature Summary

• Resistor-programmable output current limit and soft-start functionality
• Open-drain flag output for controller status indication
• Reverse current flow blocking capability

Applications

• USB power distribution systems
• PCI bus power switching
• Notebook PC power management

Procurement Notes

Verify the specific suffix '2YTS' against the official datasheet to confirm the 14-TSSOP package and tube packing configuration. Ensure the component matches the required operating temperature range of -40°C to +85°C for your application environment.

Selection Notes

Select this component when a single-channel high-side switch with adjustable current limiting is required. It is suitable for designs needing integrated fault protection and status feedback via the flag pin without excessive external components.

Part Context

This part belongs to the MIC2545A/2549A family of programmable current-limit high-side switches. While sharing core architecture, the MIC2545A lacks the internal latch found in the MIC2549A variant, offering a simpler control interface for standard power distribution tasks.

Replacement Considerations

Direct substitutes include other single high-side switches with similar 3A current ratings and 2.7V-5.5V operation. Verify pinout compatibility and current limit programming methods before swapping.