MIC4426BM

Overview

The MIC4426BM is a dual low-side MOSFET gate driver from Microchip Technology, fabricated on a BiCMOS/DMOS process. It features two inverting outputs with a peak output current of 1.5A. The device operates within a supply voltage range of 4.5V to 18V and supports CMOS and TTL logic inputs. It provides matched rise and fall times of 25ns for a 1000pF load, with a typical propagation delay under 40ns. The component is housed in an 8-lead SOIC package and is rated for an operating temperature range of -40°C to +85°C.

Feature Summary

• BiCMOS/DMOS construction for high reliability and efficiency
• Latch-up protection against reverse currents exceeding 500mA
• Logic-input threshold independent of supply voltage
• Low quiescent supply current consumption

Applications

• MOSFET driver circuits
• Clock line drivers
• Coax cable drivers
• Piezoelectric transducer drivers

Procurement Notes

Verify the specific suffix 'BM' confirms the -40°C to +85°C industrial temperature grade and 8-lead SOIC package configuration. Ensure compatibility with existing PCB footprints and thermal management requirements. Confirm that the inverting logic configuration aligns with the system design, as non-inverting variants exist within the same family. Cross-reference the manufacturer datasheet for precise pinout and electrical characteristics before finalizing procurement.

Selection Notes

Select this component when a dual low-side driver with 1.5A peak current capability is required. It is suitable for applications needing fast switching speeds with matched rise and fall times. Consider the inverting output configuration and the 4.5V to 18V operating range. This part replaces older MIC426/MIC1426 series devices. Evaluate power dissipation and thermal performance if driving large capacitive loads at high frequencies.

Part Context

The MIC4426BM belongs to the MIC4426/4427/4428 family of dual low-side MOSFET drivers. While the MIC4426 offers dual inverting outputs, the MIC4427 provides dual non-inverting outputs, and the MIC4428 combines one inverting and one non-inverting channel. All share similar electrical characteristics and fabrication processes, differing primarily in logic configuration.

Replacement Considerations

Public confirmed substitutes include the MIC4426AM for extended temperature ranges or other packages within the same functional family.