MIC2545A-2BM

Overview

The MIC2545A-2BM is a programmable high-side power switch from Microchip Technology, designed for DC power distribution. It features an N-channel MOSFET with a continuous output current of 3A and a maximum on-resistance of 50 milliohms. The device supports a supply voltage range of 2.7V to 5.5V and includes programmable current limiting between 500mA and 3A. Key timing parameters include a maximum turn-on time of 5ms and a maximum blanking time of 25µs. It operates within a temperature range of -40°C to +85°C and is available in an 8-SOIC package.

Feature Summary

• Programmable current limit allows customization between 500mA and 3A via external components
• Integrated thermal shutdown protects the device against overheating conditions
• Low on-resistance minimizes conduction losses during operation
• Built-in diode clamp prevents damage from inductive load flyback voltages

Applications

• DC power distribution systems
• Load driver circuits
• Power management applications requiring high-side switching

Procurement Notes

Verify the specific suffix (2BM) confirms the 8-SOIC package and industrial temperature grade. Ensure the design accounts for the programmable current limit setting requirements using external resistors as specified in the datasheet. Confirm compatibility with the target system's voltage levels and thermal management needs before finalizing procurement.

Selection Notes

Select this component when a robust high-side switch with adjustable current protection is required. It is suitable for applications needing low insertion loss and integrated fault protection. Consider the 8-SOIC package constraints for PCB layout. Verify that the programmable current range meets the specific load requirements without excessive external component count.

Part Context

The MIC2545A series integrates high-side power switches optimized for low-loss DC power switching. This family includes variants like the MIC2549A, offering similar functionality with potential differences in pinout or additional features. The MIC2545A-2BM specifically denotes the version with a 3A current rating and SOIC packaging, manufactured by Microchip Technology following their acquisition of Micrel.

Replacement Considerations

Direct substitutes may include other MIC2545A variants with compatible pinouts and electrical characteristics. Verify that any replacement maintains the same current limit programming capability and package dimensions. Cross-reference with Microchip's official substitution guides to ensure functional equivalence.