MIC4421YM

Overview

The MIC4421YM is a high-speed, low-side MOSFET gate driver manufactured by Microchip Technology. It features an inverting logic configuration and delivers a peak output current of 9 A. The device operates within a supply voltage range of 4.5 V to 18 V and supports input logic levels from 2.4 V up to the supply voltage (VS). It utilizes a SOIC-8 surface-mount package and provides rise and fall times of approximately 20 ns and 24 ns, respectively. The component functions reliably across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Delivers high peak output current capability for driving large MOSFETs with improved safe operating margins
• Features inverting logic configuration compatible with standard logic inputs without external level shifting
• Utilizes a rugged Bipolar/CMOS/DMOS process for efficient and reliable operation

Applications

• High-speed switching applications requiring robust gate drive currents
• Industrial motor control systems utilizing low-side MOSFET configurations
• Power supply designs necessitating fast turn-on and turn-off transitions

Procurement Notes

Verify that the specific part number suffix corresponds to the SOIC-8 surface-mount package variant rather than the PDIP through-hole version. Confirm the inverting logic function aligns with the circuit design requirements, as non-inverting alternatives exist within the same product family. Ensure compatibility with the intended operating voltage range and thermal management needs for the target application environment.

Selection Notes

Select this component when a single-channel, low-side driver with high peak current capability is required. The inverting configuration must be considered during schematic design to ensure correct signal polarity. Compare against the MIC4422A series if a non-inverting option is preferred. Evaluate the SOIC-8 package constraints regarding PCB space and thermal dissipation capabilities relative to the expected duty cycle and ambient conditions.

Part Context

This component belongs to the MIC4421A/MIC4422A series of MOSFET drivers designed for rugged performance. The MIC4421A variant specifically provides inverting functionality, distinguishing it from the non-inverting MIC4422A. Both share similar electrical characteristics but differ in logic response. The YM suffix denotes the SOIC-8 surface-mount packaging, offering a compact footprint suitable for modern electronic assemblies compared to older DIP packages.

Replacement Considerations

The MIC4421AYN serves as a direct pin-compatible alternative in a PDIP-8 through-hole package. For non-inverting requirements, the MIC4422YM is the corresponding counterpart within the same package type.