IR4427S Low-Side Gate Driver IC Equivalent & Substitute Parts

Part Overview

The IR4427S is a low-side gate driver IC manufactured by Infineon Technologies, designed for driving IGBT and N-Channel MOSFET gates in power management applications. This device operates with a supply voltage range of 6V to 20V and delivers peak output currents of 2.3A (source) and 3.3A (sink) with non-inverting logic input configuration.

The IR4427S is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and access components with active manufacturing status and improved compliance certifications.

Key Parameters

Parameter	IR4427S Value
Driven Configuration	Low-Side
Number of Drivers	2
Gate Type	IGBT, N-Channel MOSFET
Voltage - Supply	6V ~ 20V
Logic Voltage - VIL, VIH	0.8V, 2.7V
Current - Peak Output (Source, Sink)	2.3A, 3.3A
Input Type	Non-Inverting
Rise / Fall Time (Typ)	15ns, 10ns
Operating Temperature	-40°C ~ 150°C (TJ)
Package / Case	8-SOIC (0.154", 3.90mm Width)
RoHS Status	RoHS non-compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the IR4427S is determined by the following critical parameters:

Driven Configuration: Must be Low-Side
Number of Drivers: Must be 2
Input Type: Must be Non-Inverting
Package / Case: Must be 8-SOIC form factor (0.154", 3.90mm Width)
Voltage - Supply: Must support the 6V ~ 20V range or a compatible subset
Current - Peak Output: Must meet or exceed 2.3A (source) and 3.3A (sink) requirements
Gate Type Compatibility: Must support N-Channel MOSFET operation at minimum

All substitute parts listed below satisfy these core electrical and mechanical compatibility criteria. Variations in rise/fall time, operating temperature range, and compliance certifications are noted but do not disqualify substitution when the primary parameters align.

Parameter Comparison

Parameter	IR4427S	IR4427SPBF	ADP3654ARDZ-RL	MIC4124YME	MIC4127YME	MIC4424YM	MIC4424YM-TR
Manufacturer	Infineon	Infineon	Analog Devices	Microchip	Microchip	Microchip	Microchip
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	6V ~ 20V	6V ~ 20V	4.5V ~ 18V	4.5V ~ 20V	4.5V ~ 20V	4.5V ~ 18V	4.5V ~ 18V
Logic Voltage - VIL, VIH	0.8V, 2.7V	0.8V, 2.7V	0.8V, 2V	0.8V, 2.4V	0.8V, 2.4V	0.8V, 2.4V	0.8V, 2.4V
Current - Peak Output (Source, Sink)	2.3A, 3.3A	2.3A, 3.3A	4A, 4A	3A, 3A	1.5A, 1.5A	3A, 3A	3A, 3A
Rise / Fall Time (Typ)	15ns, 10ns	15ns, 10ns	10ns, 10ns	11ns, 11ns	20ns, 18ns	28ns, 32ns	28ns, 32ns
Operating Temperature	-40°C ~ 150°C	-40°C ~ 150°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 150°C	-40°C ~ 150°C
Package / Case	8-SOIC	8-SOIC	8-SOIC-EP	8-SOIC-EP	8-SOIC-EP	8-SOIC	8-SOIC
Product Status	Obsolete	Obsolete	Active	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent (Same Manufacturer, Obsolete Status)

IR4427SPBF is the direct equivalent of IR4427S, manufactured by Infineon Technologies. Both devices share identical electrical specifications and 8-SOIC packaging. IR4427SPBF differs only in packaging format (Tube vs. standard packaging) and achieves ROHS3 compliance, making it suitable for designs requiring RoHS certification while maintaining full electrical compatibility.

Active Alternatives with Enhanced Specifications

For new designs or applications requiring active product status and modern compliance certifications, the following substitutes are qualified:

ADP3654ARDZ-RL (Analog Devices): Offers higher peak output current (4A source/sink), faster switching times (10ns rise/fall), and includes an exposed pad for improved thermal performance. Supply voltage range is 4.5V ~ 18V. Operating temperature limited to -40°C ~ 125°C.
MIC4124YME (Microchip): Delivers 3A peak output current with 11ns switching times. Supports supply voltage 4.5V ~ 20V and operating temperature -40°C ~ 125°C. Supports both N-Channel and P-Channel MOSFET gates.
MIC4424YM / MIC4424YM-TR (Microchip): Provides 3A peak output current with extended operating temperature range (-40°C ~ 150°C), matching the IR4427S thermal specification. Supply voltage 4.5V ~ 18V. Available in both Tube and Cut Tape packaging options.

Limited Substitution (Reduced Performance)

MIC4127YME is electrically compatible but delivers reduced peak output current (1.5A source/sink) and slower switching times (20ns rise, 18ns fall). This device is suitable only for applications with lower current drive requirements.

Compliance and Certification

All active substitute parts are ROHS3 compliant and REACH unaffected. The IR4427S and IR4427SPBF are RoHS non-compliant and REACH unaffected. Selection should account for regulatory requirements in target markets.

Frequently Asked Questions (FAQ)

Q: Can I directly replace IR4427S with IR4427SPBF?

A: Yes. IR4427SPBF is the direct equivalent with identical electrical specifications, 8-SOIC packaging, and pin configuration. The only differences are packaging format (Tube) and improved RoHS3 compliance status.

Q: What is the key difference between the Infineon IR4427 series and Microchip MIC4424 series?

A: Both are low-side gate drivers with 2 independent channels in 8-SOIC packaging. The MIC4424YM supports extended operating temperature (-40°C ~ 150°C) matching the IR4427S, while the MIC4124YME and MIC4127YME are limited to -40°C ~ 125°C. Peak output current varies: MIC4424 delivers 3A, MIC4124 delivers 3A, and MIC4127 delivers 1.5A.

Q: Is the ADP3654ARDZ-RL a suitable replacement for high-current applications?

A: Yes, for applications requiring higher peak output current. The ADP3654ARDZ-RL delivers 4A source and sink current compared to the IR4427S specification of 2.3A and 3.3A. However, the operating temperature range is limited to -40°C ~ 125°C, and supply voltage is 4.5V ~ 18V.

Q: What does the "-EP" designation in package names mean?

A: The "-EP" suffix indicates an exposed pad variant of the 8-SOIC package. This exposed pad provides improved thermal dissipation. Devices with exposed pad variants (ADP3654ARDZ-RL, MIC4124YME, MIC4127YME) offer better heat management than standard 8-SOIC packages.

Q: Can I use MIC4127YME as a direct replacement?

A: MIC4127YME is electrically compatible in terms of configuration and packaging but delivers only 1.5A peak output current compared to the IR4427S specification of 2.3A (source) and 3.3A (sink). Use only if your application requires less than 1.5A drive current.

Q: Which substitute offers the best thermal performance?

A: ADP3654ARDZ-RL and MIC4124YME both feature exposed pad (8-SOIC-EP) packaging for superior thermal dissipation. MIC4424YM and MIC4424YM-TR use standard 8-SOIC packaging without exposed pad.

Q: Are all substitutes available in the same packaging options?

A: No. IR4427SPBF, MIC4424YM, and MIC4424YM-TR are available in Tube or Cut Tape packaging. ADP3654ARDZ-RL is available in Cut Tape & Digi-Reel format. MIC4124YME and MIC4127YME are available in Tube packaging. Verify packaging availability with your supplier.

Q: What is the minimum supply voltage for each substitute?

A: IR4427S and IR4427SPBF require 6V minimum. All other substitutes (ADP3654ARDZ-RL, MIC4124YME, MIC4127YME, MIC4424YM, MIC4424YM-TR) operate at 4.5V minimum, providing greater flexibility in low-voltage applications.

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