MIC4421BM-TR

Overview

The MIC4421BM-TR is a low-side single inverting MOSFET gate driver manufactured by Microchip Technology. It operates within a supply voltage range of 4.5 V to 18 V and delivers a peak output current of 9 A for both sourcing and sinking. 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. The component supports logic levels compatible with TTL and CMOS inputs, featuring defined input thresholds at 0.8 V and 2.4 V.

Feature Summary

• Provides high peak drive current capability suitable for rapid power MOSFET switching
• Features inverting configuration for direct interface with standard logic controllers
• Utilizes BiCMOS/DMOS construction for robust operation and rail-to-rail output swings

Applications

• Driving N-channel power MOSFETs in low-side configurations
• IGBT gate driving applications requiring fast switching speeds
• DC-DC converter circuits utilizing external low-side switches

Procurement Notes

Verify the specific suffix designation as the MIC4421BM-TR variant may be discontinued or subject to change. Confirm current availability status directly with the manufacturer or authorized distributors before finalizing procurement plans. Ensure the selected package matches the required PCB footprint and that thermal management considerations align with the SOIC-8 package constraints.

Selection Notes

Select this component when a low-side driver with 9 A peak current is required for N-channel MOSFETs or IGBTs. The inverting logic configuration must match the control signal polarity. Consider the operating temperature range and ensure the supply voltage remains within the specified 4.5 V to 18 V limits. Verify compatibility with the system's logic voltage levels to guarantee reliable switching thresholds.

Part Context

This part belongs to the MIC4421 family of high-performance gate drivers designed for demanding electrical environments. The series is characterized by its ability to survive noise spiking and reverse current conditions without latch-up. It serves as a bridge between low-power logic controllers and high-power switching devices, offering improved flexibility and reliability compared to earlier CMOS or bipolar driver generations.

Replacement Considerations

MIC4421YM-TR is listed as a substitute option.