MIC4424YM Low-Side Gate Driver IC Equivalent & Substitute Parts

Part Overview

The MIC4424YM 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 non-inverting dual-channel driver operates from 4.5V to 18V supply voltage with 3A peak output current capability on both source and sink paths. The device is currently in active product status with 22,600 units in stock.

Substitute parts are necessary when the MIC4424YM reaches end-of-life, when alternative packaging formats are required, or when design specifications allow for compatible alternatives from other manufacturers that meet the same electrical and mechanical requirements.

Key Parameters

Parameter	MIC4424YM
Manufacturer	Microchip Technology
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Driven Configuration	Low-Side
Number of Drivers	2
Gate Type	N-Channel, P-Channel MOSFET
Voltage - Supply	4.5V ~ 18V
Current - Peak Output (Source, Sink)	3A, 3A
Input Type	Non-Inverting
Operating Temperature	-40°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the MIC4424YM is determined by the following critical parameters:

Package compatibility: 8-SOIC form factor with 0.154" width (3.90mm)
Functional configuration: Low-side, dual-channel, non-inverting gate driver
Gate type support: N-Channel and P-Channel MOSFET capability
Supply voltage range: Minimum 4.5V operation (MIC4424YM operates to 18V)
Output current capability: Minimum 3A source and sink current
Mounting type: Surface mount only
Compliance: ROHS3 compliant

Substitute parts are grouped into two categories based on product status and packaging format:

Category 1 - Active Status Parts (Preferred for New Designs)

IR4427STRPBF (Infineon, Cut Tape & Digi-Reel packaging)
UCC27324DR (Texas Instruments, Cut Tape & Digi-Reel packaging)
UCC37324DR (Texas Instruments, Cut Tape & Digi-Reel packaging)

Category 2 - Obsolete or Last Time Buy Status Parts (Limited Availability)

IR4427SPBF (Infineon, Tube packaging, Obsolete status)
UCC27324D (Texas Instruments, Tube packaging, Last Time Buy status)
UCC37324D (Texas Instruments, Tube packaging, Last Time Buy status)

Parameter Comparison

Parameter	MIC4424YM	IR4427SPBF	IR4427STRPBF	UCC27324D	UCC27324DR	UCC37324D	UCC37324DR
Manufacturer	Microchip	Infineon	Infineon	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Driven Configuration	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side
Number of Drivers	2	2	2	2	2	2	2
Input Type	Non-Inverting	Non-Inverting	Non-Inverting	Non-Inverting	Non-Inverting	Non-Inverting	Non-Inverting
Voltage - Supply	4.5V ~ 18V	6V ~ 20V	6V ~ 20V	4.5V ~ 15V	4.5V ~ 15V	4.5V ~ 15V	4.5V ~ 15V
Logic Voltage - VIL, VIH	0.8V, 2.4V	0.8V, 2.7V	0.8V, 2.7V	1V, 2V	1V, 2V	1V, 2V	1V, 2V
Current - Peak Output (Source, Sink)	3A, 3A	2.3A, 3.3A	2.3A, 3.3A	4A, 4A	4A, 4A	4A, 4A	4A, 4A
Rise / Fall Time (Typ)	28ns, 32ns	15ns, 10ns	15ns, 10ns	20ns, 15ns	20ns, 15ns	20ns, 15ns	20ns, 15ns
Operating Temperature	-40°C ~ 150°C	-40°C ~ 150°C	-40°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Obsolete	Active	Last Time Buy	Active	Last Time Buy	Active
Moisture Sensitivity Level	1 (Unlimited)	2 (1 Year)	2 (1 Year)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Active Production and New Designs:

Select UCC27324DR or UCC37324DR from Texas Instruments. Both parts maintain active product status with substantial inventory availability (105,100 and 95,400 units respectively). These devices provide higher peak output current (4A source and sink) compared to the MIC4424YM, ensuring superior drive capability for MOSFET switching applications. The extended operating temperature range (-55°C to 150°C) provides additional thermal margin. Both are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

IR4427STRPBF from Infineon is an alternative active-status option with 73,320 units in stock. This part supports IGBT gate types in addition to N-Channel MOSFETs, offering broader application flexibility. However, the supply voltage range is limited to 6V minimum (versus 4.5V for Texas Instruments parts), which may restrict use in lower-voltage systems.

For Existing Inventory or Legacy System Support:

IR4427SPBF and UCC27324D/UCC37324D remain available but carry obsolete or last-time-buy status. These should be used only when existing designs are locked to these specific part numbers or when inventory depletion timelines permit their use. Inventory levels are lower (92,688, 1,215, and 2,894 units respectively).

Packaging Consideration:

The MIC4424YM is supplied in tube packaging. Equivalent substitutes are available in both tube (IR4427SPBF, UCC27324D, UCC37324D) and cut tape with Digi-Reel format (IR4427STRPBF, UCC27324DR, UCC37324DR). Verify packaging requirements for your assembly process before final part selection.

Frequently Asked Questions (FAQ)

Q: Can I substitute the MIC4424YM with any of these parts directly without circuit modification?

A: Direct substitution is possible only when the substitute part meets or exceeds all critical electrical parameters. The UCC27324DR and UCC37324DR are fully compatible drop-in replacements with superior output current capability (4A vs. 3A). The IR4427STRPBF requires verification that your supply voltage remains above 6V minimum. All substitutes maintain the same 8-SOIC package footprint and pinout compatibility.

Q: What is the difference between UCC27324 and UCC37324 series?

A: Both UCC27324 and UCC37324 devices share identical electrical specifications in the parameter comparison table. The primary distinction lies in their internal architecture and application-specific optimization. Consult Texas Instruments datasheets for detailed functional differences. For gate driver applications, either series is electrically interchangeable based on the provided specifications.

Q: Why does the IR4427 have a lower source current rating (2.3A) than the MIC4424YM (3A)?

A: The IR4427 asymmetric output current specification (2.3A source, 3.3A sink) reflects its design optimization for IGBT gate driving, where sink current demands typically exceed source current requirements. For N-Channel MOSFET applications requiring symmetric 3A capability, the Texas Instruments UCC27324 or UCC37324 series is recommended.

Q: Are all these parts ROHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant. However, moisture sensitivity levels differ. The MIC4424YM, UCC27324 series, and UCC37324 series carry MSL 1 (unlimited shelf life). The IR4427 series carries MSL 2 (1-year shelf life), requiring controlled storage conditions.

Q: What is the impact of the different operating temperature ranges?

A: The MIC4424YM operates from -40°C to 150°C junction temperature. The Texas Instruments UCC27324 and UCC37324 series extend the lower limit to -55°C, providing additional margin for cold-environment applications. The IR4427 series matches the MIC4424YM range (-40°C to 150°C). For applications within -40°C to 150°C, all parts are equivalent in this parameter.

Q: Can I use these parts interchangeably in existing PCB designs?

A: Yes, all substitute parts use the same 8-SOIC package with identical pinout and footprint. PCB layout modifications are not required. However, verify that your circuit design accommodates the different supply voltage ranges and logic threshold specifications before implementation.

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