MIC4426BMM Low-Side Gate Driver IC Equivalent & Substitute Parts

Part Overview

The MIC4426BMM is a low-side gate driver IC manufactured by Microchip Technology, designed for driving N-Channel and P-Channel MOSFETs in power management applications. This device features inverting logic, dual independent channels, and operates across a 4.5V to 18V supply voltage range with 1.5A peak output current capability.

The MIC4426BMM is currently discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production requirements. Direct substitutes maintain functional compatibility while offering improved availability, compliance certifications, or extended operating specifications.

Substiute Parts

MIC4426BMM

Microchip TechnologyIn Stock: 9826MIC4426BMM Datasheet

Current PartRFQ

MIC4426YMM

Microchip TechnologyIn Stock: 2125MIC4426YMM Datasheet

DirectRFQ

TC4426EUA

Microchip TechnologyIn Stock: 1854TC4426EUA Datasheet

MFR RecommendedRFQ

TC4426VUA

Microchip TechnologyIn Stock: 1334TC4426VUA Datasheet

MFR RecommendedRFQ

UCC37323DGN

Texas InstrumentsIn Stock: 1448UCC37323DGN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MIC4426BMM is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Driven Configuration: Low-Side (must match)
• Number of Drivers: 2 (must match)
• Gate Type: N-Channel, P-Channel MOSFET (must match)
• Input Type: Inverting (must match)
• Voltage - Supply: 4.5V ~ 18V minimum range (substitute must support this range or higher)
• Current - Peak Output: 1.5A minimum (source and sink)
• Package / Case: 8-TSSOP, 8-MSOP form factor (must match)

Mechanical Compatibility:

• Mounting Type: Surface Mount (must match)
• Supplier Device Package: 8-MSOP (must match)

Substitute parts are grouped into two categories:

Direct Equivalents (Same Base Product): MIC4426YMM maintains identical electrical specifications and packaging, differing only in packaging format (Tube vs. Bulk) and compliance status (RoHS3 Compliant vs. non-compliant).

Functional Equivalents (Different Manufacturer): TC4426EUA, TC4426VUA, and UCC37323DGN meet all electrical and mechanical compatibility criteria while offering variations in operating temperature ranges, output current capabilities, and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

MIC4426YMM is the primary direct substitute for MIC4426BMM. Both parts share identical electrical specifications, package form factor, and operating characteristics. The MIC4426YMM differs only in packaging format (Tube vs. Bulk) and compliance status (RoHS3 Compliant). This part is currently Active and maintains full compatibility with existing designs.

TC4426EUA and TC4426VUA are functional equivalents from Microchip Technology's TC4426 series. Both maintain the required electrical specifications and 8-MSOP package compatibility. TC4426EUA operates to -40°C ~ 85°C, while TC4426VUA extends to -40°C ~ 125°C. Both are RoHS3 Compliant and currently Active. Selection between these variants depends on application temperature requirements.

UCC37323DGN is a Texas Instruments alternative offering enhanced peak output current (4A source/sink vs. 1.5A) and extended temperature range (-55°C ~ 150°C). The supply voltage range is limited to 4.5V ~ 15V, which is narrower than the MIC4426BMM specification. This part carries Last Time Buy status and features an exposed pad variant of the 8-MSOP package. The UCC37323DGN is suitable for applications requiring higher drive current or extended low-temperature operation.

All substitute parts maintain RoHS3 compliance except the original MIC4426BMM. Selection should prioritize Active status parts (MIC4426YMM, TC4426EUA, TC4426VUA) for new designs and ongoing production.

Frequently Asked Questions (FAQ)

Q: Can MIC4426YMM directly replace MIC4426BMM in existing designs?

A: Yes. MIC4426YMM is a direct equivalent with identical electrical specifications, operating temperature range (-40°C ~ 150°C), peak output current (1.5A), and 8-MSOP package. The only differences are packaging format (Tube vs. Bulk) and RoHS3 compliance status. No design modifications are required.

Q: What is the key difference between TC4426EUA and TC4426VUA?

A: Both parts are functionally equivalent with identical electrical specifications and 8-MSOP packaging. The primary difference is operating temperature range: TC4426EUA operates to -40°C ~ 85°C, while TC4426VUA extends to -40°C ~ 125°C. TC4426VUA also has MSL 2 (1 Year) versus MSL 1 (Unlimited) for TC4426EUA. Select TC4426VUA for applications requiring operation above 85°C.

Q: Why does UCC37323DGN have higher peak output current (4A vs. 1.5A)?

A: UCC37323DGN is a different product line from Texas Instruments with enhanced drive capability. While this provides additional current margin, the supply voltage range is limited to 4.5V ~ 15V compared to MIC4426BMM's 4.5V ~ 18V. Verify supply voltage compatibility before substitution.

Q: Is the exposed pad on UCC37323DGN package significant?

A: The exposed pad variant (8-HVSSOP) provides improved thermal performance compared to standard 8-MSOP packages. This is beneficial for high-frequency switching applications but requires PCB layout modifications to utilize the thermal pad. Standard 8-MSOP variants without exposed pads are available from other manufacturers if thermal pad routing is not feasible.

Q: Which substitute part should be selected for new production designs?

A: MIC4426YMM is recommended for new designs as the direct equivalent with Active product status, identical specifications, and RoHS3 compliance. TC4426EUA and TC4426VUA are secondary options if MIC4426YMM availability is constrained. UCC37323DGN carries Last Time Buy status and should be avoided for new long-term production unless specific performance advantages (higher current, extended temperature) are required.

Q: Are all substitute parts available in the same 8-MSOP package?

A: Yes. All substitute parts use the 8-MSOP (0.118", 3.00mm Width) package form factor, ensuring mechanical compatibility with existing PCB layouts. UCC37323DGN uses an 8-HVSSOP variant with an exposed pad, which is mechanically compatible but requires optional thermal pad routing on the PCB.

Q: What compliance certifications apply to these parts?

A: MIC4426BMM is RoHS non-compliant. All substitute parts (MIC4426YMM, TC4426EUA, TC4426VUA, UCC37323DGN) are RoHS3 Compliant. All parts are REACH Unaffected and carry EAR99 ECCN classification.