IR4426STRPBF Low-Side Gate Driver IC Equivalent & Substitute Parts

Part Overview

The IR4426STRPBF 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 inverting gate driver operates with a supply voltage range of 6V to 20V and delivers peak output currents of 2.3A (source) and 3.3A (sink). The device is packaged in an 8-SOIC form factor and is currently in active product status with ROHS3 compliance.

Substitute parts are necessary when the original IR4426STRPBF is unavailable, when alternative packaging formats are required, or when design specifications allow for extended operating temperature ranges or enhanced electrical performance characteristics.

Key Parameters

Parameter	IR4426STRPBF
Manufacturer	Infineon Technologies
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	Inverting
Rise / Fall Time (Typ)	15ns, 10ns
Operating Temperature	-40°C ~ 150°C (TJ)
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Driven Configuration: Low-Side (all substitutes must match)
Channel Type: Independent (all substitutes must match)
Number of Drivers: 2 (all substitutes must match)
Input Type: Inverting (all substitutes must match)
Package / Case: 8-SOIC form factor (all substitutes must match)
Mounting Type: Surface Mount (all substitutes must match)

Allowable Parameter Variations:

Voltage - Supply: Substitute range must encompass or exceed the 6V ~ 20V requirement
Current - Peak Output: Substitute values may be equal to or greater than 2.3A (source) and 3.3A (sink)
Operating Temperature: Substitute range may be equal to or broader than -40°C ~ 150°C
Rise / Fall Time: Substitute values may be equal to or faster than 15ns (rise) and 10ns (fall)
Logic Voltage: Substitute VIL and VIH must be compatible with standard logic levels

The substitute parts listed below meet all mandatory compatibility criteria and fall within allowable electrical parameter variations.

Parameter Comparison

Parameter	IR4426STRPBF	IXDI602SI	IXDI602SIA	IXDI602SIATR	IXDI602SITR	LM5111-2M/NOPB	LM5111-2MX/NOPB	MAX4426CSA+	MAX4426ESA+	MAX626CSA+T	MAX626ESA+
Driven Configuration	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side	Low-Side
Number of Drivers	2	2	2	2	2	2	2	2	2	2	2
Input Type	Inverting	Inverting	Inverting	Inverting	Inverting	Inverting	Inverting	Inverting	Inverting	Inverting	Inverting
Voltage - Supply	6V ~ 20V	4.5V ~ 35V	4.5V ~ 35V	4.5V ~ 35V	4.5V ~ 35V	3.5V ~ 14V	3.5V ~ 14V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 18V	4.5V ~ 18V
Logic Voltage - VIL, VIH	0.8V, 2.7V	0.8V, 3V	0.8V, 3V	0.8V, 3V	0.8V, 3V	0.8V, 2.2V	0.8V, 2.2V	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	2A, 2A	2A, 2A	2A, 2A	2A, 2A	3A, 5A	3A, 5A	1.5A, 1.5A	1.5A, 1.5A	2A, 2A	2A, 2A
Rise / Fall Time (Typ)	15ns, 10ns	7.5ns, 6.5ns	7.5ns, 6.5ns	7.5ns, 6.5ns	7.5ns, 6.5ns	14ns, 12ns	14ns, 12ns	20ns, 20ns	20ns, 20ns	25ns, 20ns	25ns, 20ns
Operating Temperature	-40°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	0°C ~ 70°C (TA)	-40°C ~ 85°C (TA)	0°C ~ 70°C (TA)	-40°C ~ 85°C (TA)
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width) Exposed Pad	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width) Exposed Pad	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Last Time Buy	Active	Active	Active	Active	Active

Engineering Selection Recommendations

IXYS IXDI602 Series (IXDI602SI, IXDI602SIA, IXDI602SIATR, IXDI602SITR)

The IXDI602 series from IXYS Integrated Circuits Division provides extended supply voltage range (4.5V ~ 35V) and broader operating temperature range (-55°C ~ 150°C). These devices feature faster switching times (7.5ns rise, 6.5ns fall) compared to the IR4426STRPBF. Available in multiple packaging formats including Tube, Cut Tape & Digi-Reel, and Tape & Reel configurations. All variants are ROHS3 compliant and carry MSL 1 rating. The IXDI602SI and IXDI602SITR variants include exposed pad packages for enhanced thermal performance.

Texas Instruments LM5111 Series (LM5111-2M/NOPB, LM5111-2MX/NOPB)

The LM5111-2M/NOPB is designated as Last Time Buy status; however, the LM5111-2MX/NOPB variant maintains Active product status. Both deliver superior peak output current (3A source, 5A sink) compared to the IR4426STRPBF. Supply voltage range is 3.5V ~ 14V, which does not encompass the full 6V ~ 20V specification of the original part. Operating temperature range is -40°C ~ 125°C. Both variants are ROHS3 compliant with MSL 1 rating. The LM5111-2MX/NOPB is available in Tape & Reel packaging with 6085 units in stock.

Analog Devices Maxim MAX4426 Series (MAX4426CSA+, MAX4426ESA+)

The MAX4426 series operates within 4.5V ~ 18V supply range and delivers 1.5A peak output current (both source and sink). The MAX4426CSA+ is rated for 0°C ~ 70°C operating temperature, while MAX4426ESA+ extends to -40°C ~ 85°C. Both are ROHS3 compliant with MSL 1 rating and available in Tube packaging. Switching times are 20ns (both rise and fall), which are slower than the IR4426STRPBF.

Analog Devices Maxim MAX626 Series (MAX626CSA+T, MAX626ESA+)

The MAX626 series provides 2A peak output current (both source and sink) and operates within 4.5V ~ 18V supply range. The MAX626CSA+T is available in Cut Tape & Digi-Reel packaging with 2800 units in stock and is rated for 0°C ~ 70°C. The MAX626ESA+ variant extends operating temperature to -40°C ~ 85°C and is available in Tube packaging. Both are ROHS3 compliant with MSL 1 rating. Switching times are 25ns (rise) and 20ns (fall).

Frequently Asked Questions (FAQ)

Q: Can IXDI602SI replace IR4426STRPBF in all applications?

A: The IXDI602SI meets all mandatory compatibility criteria: low-side configuration, independent dual-channel architecture, inverting input type, and 8-SOIC package. The IXDI602SI operates across a wider supply voltage range (4.5V ~ 35V) and broader temperature range (-55°C ~ 150°C). However, the IXDI602SI peak output current is 2A (source and sink), which is lower than the IR4426STRPBF specification of 2.3A source and 3.3A sink. Applications requiring the full 3.3A sink current must evaluate whether 2A is sufficient for the gate drive requirements.

Q: What is the difference between IXDI602SIA and IXDI602SI?

A: Both devices share identical electrical specifications. The primary difference is packaging: IXDI602SI includes an exposed pad (8-SOIC-EP) for improved thermal dissipation, while IXDI602SIA uses standard 8-SOIC packaging without exposed pad. IXDI602SI is supplied in Tube packaging, IXDI602SIA in Tube, and IXDI602SIATR in Cut Tape & Digi-Reel format.

Q: Why does LM5111-2M/NOPB show Last Time Buy status?

A: Last Time Buy status indicates that Texas Instruments has announced end-of-life for this specific part number variant. The LM5111-2MX/NOPB variant remains in Active status and provides identical electrical performance with Tape & Reel packaging. For new designs, LM5111-2MX/NOPB is the recommended selection.

Q: Can MAX4426 series be used as a direct replacement?

A: The MAX4426 series meets all mandatory compatibility criteria but delivers only 1.5A peak output current compared to the IR4426STRPBF specification of 2.3A source and 3.3A sink. Applications with lower gate drive current requirements may use MAX4426 series. The MAX4426ESA+ provides the broader operating temperature range (-40°C ~ 85°C) suitable for industrial applications.

Q: What are the thermal considerations when selecting between exposed pad and standard packages?

A: The IXDI602SI and IXDI602SITR variants include exposed pad (8-SOIC-EP) packages that provide direct thermal connection to the substrate, improving heat dissipation. Standard 8-SOIC packages (IXDI602SIA, IXDI602SIATR) rely on lead frame thermal paths. For applications with high switching frequency or elevated ambient temperatures, exposed pad variants are preferred.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed are ROHS3 compliant. All carry REACH Unaffected status and EAR99 ECCN classification, matching the regulatory compliance profile of the IR4426STRPBF.

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