MIC2544-2BM

Overview

The MIC2544-2BM is a single-channel high-side power switch IC designed for load management applications. It operates within a supply voltage range of 2.7V to 5.5V and supports an output current up to 1.5A. The device features a programmable current limit adjustable from 100mA to 1.5A, allowing precise control over load protection thresholds. Key electrical parameters include a maximum on-resistance of 120mΩ, a maximum turn-on time of 5ms, and a maximum blanking time of 22μs. It functions across an operating temperature range of -40°C to +85°C and is housed in an 8-pin SOIC surface-mount package.

Feature Summary

• Integrates a programmable current limit mechanism for customizable overcurrent protection
• Provides high-side switching capability with low on-resistance for efficient power delivery
• Features integrated soft-start functionality to manage inrush currents during activation

Applications

• USB port power distribution and protection
• Peripheral device hot-plugging management
• Battery-powered equipment load switching

Procurement Notes

Verify the specific suffix against official Microchip documentation to confirm pinout compatibility and thermal characteristics. Ensure the selected variant matches the required package type and operating temperature range for the target application environment. Cross-reference the datasheet revision history to validate parameter consistency before finalizing procurement specifications.

Selection Notes

Select this component when a single-channel high-side switch with adjustable current limiting is required. Consider the 120mΩ on-resistance for power loss calculations and the 2.7V minimum supply voltage for compatibility with low-voltage logic systems. Evaluate the 1.5A current capacity against peak load requirements to ensure adequate headroom for transient conditions.

Part Context

The MIC2544 series comprises high-side power switches intended for managing loads in portable and industrial electronics. This specific model represents a single-channel variant within the family, offering a balance between compact packaging and robust protection features. It serves as a critical interface component for isolating and protecting sensitive circuits from overload events.

Replacement Considerations

• MIC2544-1YMM

FAQ

What is the function of the programmable current limit?

It allows users to set the threshold at which the switch disconnects the load to prevent damage from overcurrent conditions, adjustable via an external resistor.

Does the MIC2544-2BM support hot-plugging?

Yes, the integrated soft-start feature minimizes inrush currents, making it suitable for hot-plug applications where sudden power surges must be avoided.