MIC4424BN Equivalent & Substitute Parts

Part Overview

The MIC4424BN 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 part operates with a supply voltage range of 4.5V to 18V and delivers peak output currents of 3A (source and sink). The MIC4424BN is classified as obsolete, which necessitates identification of equivalent and substitute parts for new designs or production continuity.

Substiute Parts

MIC4424BN

Microchip TechnologyIn Stock: 1794MIC4424BN Datasheet

Current PartRFQ

MIC4424YN

Microchip TechnologyIn Stock: 5117MIC4424YN Datasheet

DirectRFQ

TC4424EPA

Microchip TechnologyIn Stock: 4211TC4424EPA Datasheet

DirectRFQ

TC4424VPA

Microchip TechnologyIn Stock: 5217TC4424VPA Datasheet

UpgradeRFQ

TC4424CPA

Microchip TechnologyIn Stock: 18968TC4424CPA Datasheet

MFR RecommendedRFQ

UCC37324P

Texas InstrumentsIn Stock: 1195UCC37324P Datasheet

DirectRFQ

IR4427PBF

International RectifierIn Stock: 3317IR4427PBF Datasheet

MFR RecommendedRFQ

UCC27424P

Texas InstrumentsIn Stock: 5272UCC27424P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the MIC4424BN is determined by strict equivalence in the following critical parameters:

• Driven Configuration: Low-Side only
• Number of Drivers: 2 independent channels
• Gate Type: N-Channel and P-Channel MOSFET compatibility
• Package / Case: 8-DIP (0.300", 7.62mm) form factor
• Input Type: Non-Inverting logic
• Voltage - Supply Range: Minimum 4.5V to maximum 18V (or compatible subset)
• Current - Peak Output: Minimum 3A source and sink capability
• Operating Temperature Range: Minimum -40°C to maximum 150°C (or compatible subset)

Substitute parts are grouped into three categories:

Direct Equivalents (MIC4424YN, TC4424EPA, TC4424VPA, TC4424CPA): Parts that maintain identical or superior electrical specifications while offering improved product status (Active vs. Obsolete) or enhanced compliance certifications (RoHS3 Compliant).

Cross-Manufacturer Alternatives (UCC37324P, UCC27424P, IR4427PBF): Parts from different manufacturers that meet or exceed the core electrical requirements and package specifications, though with variations in specific parameters such as rise/fall times or temperature ranges.

Upgrade Options (TC4424VPA, TC4424CPA): Microchip parts with faster switching characteristics (23ns/25ns vs. 28ns/32ns rise/fall times) and active product status, suitable for performance-critical applications.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement with Improved Compliance: MIC4424YN is the primary substitute. It maintains identical electrical specifications to the MIC4424BN while offering Active product status and RoHS3 compliance. This part is recommended for applications requiring minimal design changes and maximum compatibility.

For Performance Enhancement: TC4424EPA, TC4424VPA, and TC4424CPA offer faster switching characteristics (23ns/25ns rise/fall times versus 28ns/32ns) while maintaining the same supply voltage range and output current ratings. TC4424CPA is manufacturer-recommended and carries the highest inventory availability (18,900 units). The operating temperature range for TC4424CPA begins at 0°C rather than -40°C, which may be a consideration for extended temperature applications.

For Cross-Manufacturer Alternatives: UCC37324P and UCC27424P from Texas Instruments provide higher peak output currents (4A source and sink) and faster switching times. Both parts carry Last Time Buy status. UCC37324P supports an extended temperature range (-55°C to 150°C). UCC27424P operates at a lower minimum supply voltage (4V) but has a reduced maximum operating temperature (125°C ambient).

For IGBT Applications: IR4427PBF from International Rectifier is suitable for applications requiring IGBT gate driving capability. It supports a wider supply voltage range (6V to 20V) and delivers the fastest switching performance (15ns/10ns rise/fall times). Peak output current asymmetry (2.3A source, 3.3A sink) must be evaluated against application requirements.

Compliance Consideration: The MIC4424BN is RoHS non-compliant. All recommended substitutes except IR4427PBF carry RoHS3 compliance certification, making them suitable for applications subject to RoHS regulations.

Frequently Asked Questions (FAQ)

Q: Can MIC4424YN be used as a direct drop-in replacement for MIC4424BN?

A: Yes. MIC4424YN maintains identical electrical specifications, package form factor (8-DIP), and pinout. The primary differences are Active product status and RoHS3 compliance. No circuit modifications are required.

Q: What is the difference between TC4424EPA, TC4424VPA, and TC4424CPA?

A: All three parts are Microchip TC4424 variants with identical electrical specifications except for operating temperature range. TC4424CPA has a 0°C minimum operating temperature (versus -40°C for EPA and VPA). TC4424CPA is manufacturer-recommended and has the highest inventory availability. Selection depends on the minimum operating temperature requirement of the application.

Q: Why do UCC37324P and UCC27424P have Last Time Buy status?

A: Last Time Buy status indicates that Texas Instruments has discontinued these parts and will no longer manufacture them after a specified date. Existing inventory is available for purchase, but long-term availability is not guaranteed. These parts are suitable for applications with established production volumes but not recommended for new designs requiring long-term supply.

Q: Can IR4427PBF replace MIC4424BN in all applications?

A: IR4427PBF is functionally compatible for low-side gate driving of N-Channel MOSFETs and IGBTs. However, it has asymmetric output currents (2.3A source, 3.3A sink) compared to the symmetric 3A specification of MIC4424BN. Applications sensitive to source/sink current matching should be evaluated. IR4427PBF also supports a wider supply voltage range (6V to 20V), which may be advantageous in some designs.

Q: Are all substitute parts available in the same packaging?

A: Yes. All substitute parts listed are available in 8-DIP (0.300", 7.62mm) through-hole packaging, maintaining mechanical and electrical compatibility with the original MIC4424BN footprint.

Q: Which substitute offers the best performance improvement?

A: IR4427PBF delivers the fastest switching performance with 15ns rise time and 10ns fall time. TC4424 variants (EPA, VPA, CPA) offer moderate performance improvement (23ns/25ns) with full Microchip ecosystem compatibility. UCC37324P and UCC27424P from Texas Instruments provide comparable switching speeds (20ns/15ns) with higher output current capability (4A).

Q: What compliance certifications should I verify for my application?

A: All recommended substitutes carry RoHS3 compliance except IR4427PBF. All parts are REACH Unaffected and classified as EAR99 for export control purposes. Verify specific compliance requirements for your target market and application before final part selection.