IR4426STR Low-Side Gate Driver IC Equivalent & Substitute Parts

Part Overview

The IR4426STR 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 features independent dual-channel configuration with inverting input logic. The IR4426STR is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Active alternatives with compatible electrical and mechanical specifications are available from multiple manufacturers.

Key Parameters

Parameter	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	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

Substitute Part Grouping Explanation

Substitution of the IR4426STR is determined by strict alignment of the following electrical and mechanical parameters:

Critical Substitution Criteria:

Driven configuration must be low-side
Dual independent channels required
Gate type compatibility with IGBT and N-Channel MOSFET
Supply voltage range must encompass or exceed 6V ~ 20V
Logic voltage thresholds (VIL, VIH) must be compatible with 0.8V, 2.7V
Peak output current (source and sink) must meet or exceed 2.3A and 3.3A respectively
Input type must be inverting
Package must be 8-SOIC form factor
Operating temperature range must support -40°C ~ 150°C (TJ)

Substitute parts are grouped into two categories based on parameter alignment:

Category A - Full Parameter Compatibility: Parts meeting all electrical specifications within the defined ranges, including supply voltage, output current, and temperature operating range.

Category B - Extended Parameter Range: Parts exceeding specified parameters in supply voltage, output current, or temperature range, providing enhanced performance margins while maintaining functional compatibility.

Parameter Comparison

Part Number	Manufacturer	Supply Voltage	Peak Output Current (Source, Sink)	Logic Voltage VIL, VIH	Rise / Fall Time (Typ)	Operating Temperature	Package	Product Status
IR4426STR	Infineon Technologies	6V ~ 20V	2.3A, 3.3A	0.8V, 2.7V	15ns, 10ns	-40°C ~ 150°C (TJ)	8-SOIC	Obsolete
IR4426STRPBF	Infineon Technologies	6V ~ 20V	2.3A, 3.3A	0.8V, 2.7V	15ns, 10ns	-40°C ~ 150°C (TJ)	8-SOIC	Active
IXDI602SI	IXYS Integrated Circuits Division	4.5V ~ 35V	2A, 2A	0.8V, 3V	7.5ns, 6.5ns	-55°C ~ 150°C (TJ)	8-SOIC-EP	Active
IXDI602SIA	IXYS Integrated Circuits Division	4.5V ~ 35V	2A, 2A	0.8V, 3V	7.5ns, 6.5ns	-55°C ~ 150°C (TJ)	8-SOIC	Active
IXDI602SIATR	IXYS Integrated Circuits Division	4.5V ~ 35V	2A, 2A	0.8V, 3V	7.5ns, 6.5ns	-55°C ~ 150°C (TJ)	8-SOIC	Active
IXDI602SITR	IXYS Integrated Circuits Division	4.5V ~ 35V	2A, 2A	0.8V, 3V	7.5ns, 6.5ns	-55°C ~ 150°C (TJ)	8-SOIC-EP	Active
LM5111-2M/NOPB	Texas Instruments	3.5V ~ 14V	3A, 5A	0.8V, 2.2V	14ns, 12ns	-40°C ~ 125°C (TJ)	8-SOIC	Last Time Buy
LM5111-2MX/NOPB	Texas Instruments	3.5V ~ 14V	3A, 5A	0.8V, 2.2V	14ns, 12ns	-40°C ~ 125°C (TJ)	8-SOIC	Active
MAX4426CSA+	Analog Devices Inc./Maxim Integrated	4.5V ~ 18V	1.5A, 1.5A	0.8V, 2.4V	20ns, 20ns	0°C ~ 70°C (TA)	8-SOIC	Active
MAX4426CSA+T	Analog Devices Inc./Maxim Integrated	4.5V ~ 18V	1.5A, 1.5A	0.8V, 2.4V	20ns, 20ns	0°C ~ 70°C (TA)	8-SOIC	Active
MAX4426ESA+	Analog Devices Inc./Maxim Integrated	4.5V ~ 18V	1.5A, 1.5A	0.8V, 2.4V	20ns, 20ns	-40°C ~ 85°C (TA)	8-SOIC	Active

Engineering Selection Recommendations

Primary Recommendation - Direct Replacement: IR4426STRPBF is the direct active equivalent of the obsolete IR4426STR. Both parts share identical electrical specifications and 8-SOIC packaging. IR4426STRPBF is ROHS3 compliant and available in Cut Tape and Digi-Reel packaging formats, with 20,623 units in stock.

Secondary Recommendations - Extended Performance: IXDI602 series (IXDI602SI, IXDI602SIA, IXDI602SIATR, IXDI602SITR) from IXYS provides extended supply voltage range (4.5V ~ 35V) and lower propagation delay (7.5ns/6.5ns rise/fall time). These parts are ROHS3 compliant and support expanded operating temperature range (-55°C ~ 150°C TJ). Available packaging includes standard 8-SOIC and 8-SOIC-EP variants.

LM5111-2MX/NOPB from Texas Instruments offers higher peak output current (3A source, 5A sink) and is actively produced. This part is ROHS3 compliant with 6,085 units in stock. Note that the supply voltage range (3.5V ~ 14V) does not fully encompass the original 6V ~ 20V specification, and maximum operating temperature is limited to 125°C.

Alternative Options - Reduced Performance: MAX4426 series (MAX4426CSA+, MAX4426CSA+T, MAX4426ESA+) from Analog Devices provides functional compatibility in 8-SOIC packaging. These parts feature reduced peak output current (1.5A source and sink) and slower propagation delay (20ns rise/fall time). MAX4426ESA+ supports extended temperature range (-40°C ~ 85°C TA) and is ROHS3 compliant with 12,600 units in stock.

Compliance Status: All recommended substitute parts are ROHS3 compliant and REACH unaffected. The original IR4426STR is RoHS non-compliant, making active alternatives necessary for new designs subject to environmental regulations.

Frequently Asked Questions (FAQ)

Q: Can IR4426STRPBF directly replace IR4426STR in existing designs? A: Yes. IR4426STRPBF is the active equivalent with identical electrical specifications, gate type compatibility, and 8-SOIC packaging. The primary difference is product status (active vs. obsolete) and improved RoHS3 compliance.

Q: What are the key differences between IXDI602 variants? A: IXDI602SI and IXDI602SITR feature 8-SOIC-EP (exposed pad) packaging for enhanced thermal performance. IXDI602SIA and IXDI602SIATR use standard 8-SOIC packaging. Packaging format (Tube, Cut Tape, or Tape & Reel) differs by part number suffix. All variants share identical electrical specifications.

Q: Why does LM5111-2MX/NOPB have a lower maximum operating temperature than IR4426STR? A: LM5111-2MX/NOPB is specified to -40°C ~ 125°C (TJ), compared to IR4426STR at -40°C ~ 150°C (TJ). Applications requiring operation above 125°C junction temperature must use IR4426STRPBF or IXDI602 series alternatives.

Q: Are MAX4426 parts suitable for high-current applications? A: MAX4426 series provides 1.5A peak output current (source and sink), which is lower than IR4426STR (2.3A source, 3.3A sink). Applications requiring higher gate drive current should use IR4426STRPBF, IXDI602 series, or LM5111-2MX/NOPB.

Q: What is the significance of the 8-SOIC-EP package variant? A: The exposed pad (EP) variant in IXDI602SI and IXDI602SITR provides direct thermal connection to the substrate, improving heat dissipation. Standard 8-SOIC packages (IXDI602SIA, IXDI602SIATR) do not include this feature. Both are mechanically compatible with 8-SOIC PCB footprints.

Q: Which substitute part offers the widest supply voltage range? A: IXDI602 series supports 4.5V ~ 35V supply voltage, the widest range among all alternatives. This extended range provides flexibility for applications with variable supply conditions.

Q: Are all substitute parts RoHS compliant? A: Yes. All recommended substitute parts are ROHS3 compliant. The original IR4426STR is RoHS non-compliant, making compliant alternatives necessary for designs subject to environmental regulations.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message