MIC4421BM

Overview

The MIC4421BM is a low-side single inverting MOSFET gate driver manufactured by Microchip Technology. It features a peak output current of 9 A and operates within a supply voltage range of 4.5 V to 18 V. The device utilizes an 8-SOIC surface-mount package with a width of 3.90 mm. Typical switching performance includes a rise time of 20 ns and a fall time of 24 ns. Logic input thresholds are defined at 0.8 V for low and 2.4 V for high. The component supports junction temperatures up to 150°C and is designed for driving IGBTs and N-channel MOSFETs.

Feature Summary

• Delivers high peak drive current of 9 A for rapid MOSFET and IGBT switching
• Provides inverting logic configuration for direct interface with standard control signals
• Operates reliably across a wide supply voltage range from 4.5 V to 18 V
• Features fast switching times with typical rise and fall durations under 25 ns

Applications

• Driving N-channel power MOSFETs in motor control circuits
• Switching IGBT modules in industrial power inverters
• High-speed power conversion stages in DC-DC converters
• Gate drive interfaces for solid-state relays

Procurement Notes

Verify the specific suffix against official Microchip documentation to confirm package type and temperature rating. Confirm RoHS compliance status as historical data indicates some variants may not meet current standards. Check for obsolescence notices or discontinuation announcements prior to finalizing procurement plans. Ensure the supplier provides valid traceability for the semiconductor batch.

Selection Notes

Select this component when a single low-side driver with high peak current capability is required. The inverting configuration suits applications where active-low control signals are standard. Consider the 8-SOIC package constraints for thermal management and PCB layout. Verify that the input logic levels match the controlling microcontroller or FPGA outputs.

Part Context

This part belongs to the MIC4421 family of high-current MOSFET drivers. It serves as a bridge between low-power logic controllers and high-power switching devices. The series is characterized by robust output stages capable of handling significant transient currents. It complements other variants like the MIC4421AYN which offer different packaging options.

Replacement Considerations

MIC4421YM-TR is listed as a direct substitute available through distributors.