MIC4421ABN

Overview

The MIC4421ABN is a single-channel, low-side MOSFET gate driver manufactured by Microchip Technology. It features an inverting input configuration and delivers a peak output current of 9 A for both sourcing and sinking. The device operates within a supply voltage range of 4.5 V to 18 V. Typical switching performance includes a rise time of 20 ns and a fall time of 24 ns. It is housed in an 8-pin PDIP package with a standard lead pitch of 0.300 inches (7.62 mm).

Feature Summary

• Delivers high peak drive current of 9 A to rapidly charge and discharge MOSFET gates.
• Utilizes an inverting logic configuration to control low-side N-channel MOSFETs.
• Operates on a wide supply voltage range from 4.5 V to 18 V.

Applications

• High-speed power switching circuits requiring fast MOSFET turn-on and turn-off.
• Low-side gate driving in DC-DC converters and motor control systems.
• Inverter bridges and power conversion topologies utilizing N-channel devices.

Procurement Notes

Verify the specific suffix 'BN' corresponds to the 8-PDIP tube packaging when ordering. Confirm that the inverting logic aligns with the system's control signal requirements. Ensure the operating environment remains within the specified electrical limits for reliable operation.

Selection Notes

Select this component for applications requiring a dedicated low-side driver with high peak current capability. The inverting configuration necessitates careful consideration of input signal polarity relative to the desired output state. Verify compatibility with the target MOSFET's gate charge requirements using the 9 A drive strength specification.

Part Context

This part belongs to the MIC4421A series of high-speed MOSFET drivers. It is designed specifically for low-side switching applications. The device integrates a robust output stage capable of handling significant transient currents, making it suitable for demanding power electronics environments where switching speed is critical.

Replacement Considerations

Direct replacement options include other variants within the MIC4421A family, such as the MIC4421ACN or MIC4421AZN, provided they match the required package type and pinout configuration.

FAQ

Is the MIC4421ABN a high-side or low-side driver?

It is a low-side driver designed to switch N-channel MOSFETs connected to ground.

What is the typical switching speed of this device?

The typical rise time is 20 ns and the typical fall time is 24 ns.