MIC4421CT

Overview

The MIC4421CT is a low-side single-channel 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. The device features an inverting logic configuration with typical rise and fall times of 20 ns and 24 ns, respectively. It is housed in an 8-SOIC surface-mount package and supports an operating temperature range from -40°C to +125°C junction temperature.

Feature Summary

• Provides high-current drive capability for efficient switching of N-channel power MOSFETs and IGBTs.
• Features fast propagation delays and symmetric rise/fall times to minimize switching losses.
• Includes internal shoot-through protection to prevent simultaneous conduction in half-bridge configurations.

Applications

• Motor control systems requiring robust gate driving for power switches.
• DC-DC converter topologies utilizing synchronous rectification.
• Inverter circuits for AC motor drives and power supplies.

Procurement Notes

Verify the specific suffix against official Microchip documentation to confirm exact temperature grade and packaging type. Ensure compatibility with system voltage levels and thermal requirements before integration. Cross-reference datasheet revisions to confirm pinout consistency with existing designs.

Selection Notes

Select this component when a single low-side driver with high peak current is required. Consider the SOIC package for surface-mount assembly constraints. Evaluate thermal performance at the expected junction temperature to ensure reliability under continuous operation conditions.

Part Context

This part belongs to the MIC4421 family of high-speed MOSFET drivers. It serves as a complementary solution to non-inverting variants and dual-channel versions within the same product line, offering standardized interface characteristics for power management applications.

Replacement Considerations

MIC4421CMTR

FAQ

What is the input logic configuration?

The MIC4421CT features an inverting input configuration, where a low input signal turns the output on.

Does the device include shoot-through protection?

Yes, the internal circuitry includes shoot-through protection to prevent cross-conduction in bridge applications.