MIC4420BM

Overview

The MIC4420BM is a low-side MOSFET gate driver manufactured by Microchip Technology, housed in an 8-pin SOIC package. It delivers a peak output current of 6 A with matched rise and fall times of 25 ns. The device operates within a supply voltage range of 4.5 V to 18 V and features non-inverting logic configuration. Key electrical parameters include a maximum delay time of 18 ns, a typical input capacitance of 6 pF, and a supply current of 450 µA with a logic high input. It withstands negative input swings up to 5 V and supports capacitive loads up to 10,000 pF.

Feature Summary

• Capable of driving large MOSFETs with a 6 A peak output current for improved safe operating margin.
• Accepts logic inputs from 2.4 V to VS without requiring external speed-up components.
• Proprietary circuitry allows the input to swing negative by up to 5 V without damage.
• Latch-up protected design withstands over 500 mA reverse output current.

Applications

• Switch mode power supplies
• Motor controls
• Pulse transformer drivers
• Class-D switching amplifiers

Procurement Notes

Verify the specific suffix 'BM' against the manufacturer's official datasheet to confirm temperature grade and packaging details. Ensure compatibility with the target PCB footprint for the SOIC-8 package. Confirm RoHS compliance status through the latest product documentation before finalizing procurement specifications.

Selection Notes

Select this component when a non-inverting low-side driver with 6 A peak current is required. It is suitable for applications needing fast switching speeds with 25 ns rise/fall times. Consider the 4.5 V to 18 V operating range and the ability to handle negative input swings if interfacing with high-side sensing circuits or floating grounds.

Part Context

The MIC4420BM belongs to the MIC4420 family of MOSFET drivers, which are designed for high reliability in demanding electrical environments. This series utilizes BiCMOS/DMOS construction to dissipate minimum power while providing rail-to-rail voltage swings. The MIC4420 specifically serves as the non-inverting variant within this lineup.

Replacement Considerations

MIC4429YM (Inverting version)

FAQ

Can the MIC4420BM input withstand negative voltage?

Yes, proprietary circuits allow the input to swing negative by as much as 5 V without damaging the part.

What is the maximum capacitive load the driver can support?

The MIC4420BM is capable of driving high capacitive loads up to 10,000 pF.