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IXDI404SI Low-Side Gate Driver IC Equivalent & Substitute Parts
Part Overview
The IXDI404SI is a low-side gate driver IC manufactured by IXYS, designed for driving IGBT, N-Channel, and P-Channel MOSFET devices in power management applications. This 8-SOIC surface mount component operates across a wide supply voltage range of 4.5V to 35V with independent dual-channel configuration and inverting input logic. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.
Substiute Parts
Key Parameters
| Parameter | IXDI404SI |
|---|---|
| Manufacturer | IXYS |
| Package Type | 8-SOIC (0.154", 3.90mm Width) |
| Driven Configuration | Low-Side |
| Number of Drivers | 2 |
| Gate Type | IGBT, N-Channel, P-Channel MOSFET |
| Voltage Supply Range | 4.5V ~ 35V |
| Logic Voltage VIL / VIH | 0.8V / 2.5V |
| Peak Output Current (Source / Sink) | 4A / 4A |
| Input Type | Inverting |
| Rise / Fall Time (Typical) | 16ns / 13ns |
| Operating Temperature Range | -55°C ~ 150°C (TJ) |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
| Moisture Sensitivity Level | MSL 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the IXDI404SI is determined by strict alignment of the following electrical and mechanical parameters:
Critical Substitution Criteria:
- Package type: 8-SOIC form factor (0.154", 3.90mm Width)
- Driven configuration: Low-side gate driver
- Channel configuration: Independent dual-channel
- Input logic: Inverting
- Gate type compatibility: Support for IGBT and/or MOSFET (N-Channel, P-Channel)
- Supply voltage range: Must encompass or overlap with 4.5V ~ 35V
- Peak output current: Minimum 4A source and 4A sink capability
- Operating temperature: Must support -55°C to 150°C range or equivalent industrial specification
- Mounting: Surface mount, 8-SOIC package
Substitute parts are grouped into two categories based on product status and availability:
Category A - Active Status Substitutes (Recommended for New Designs): Parts with active product status and current manufacturing support provide long-term availability and supply chain stability.
Category B - Obsolete Status Substitutes (Legacy Support): Parts with obsolete status offer functional equivalence but may have limited inventory and no ongoing manufacturing support.
Parameter Comparison
| Parameter | IXDI404SI | IXDI604SI | IR4426STRPBF | IRS4426STRPBF | MIC4123YME-TR | MIC4126YME | MAX626CSA+T | MAX626ESA+ |
|---|---|---|---|---|---|---|---|---|
| Manufacturer | IXYS | IXYS | Infineon | Infineon | Microchip | Microchip | Analog Devices | Analog Devices |
| Product Status | Obsolete | Active | Obsolete | Active | Active | Active | Active | Active |
| Package | 8-SOIC | 8-SOIC-EP | 8-SOIC | 8-SOIC | 8-SOIC-EP | 8-SOIC-EP | 8-SOIC | 8-SOIC |
| Driven Configuration | 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 |
| Gate Type | IGBT, N-Ch, P-Ch MOSFET | IGBT, N-Ch, P-Ch MOSFET | IGBT, N-Ch MOSFET | IGBT, N-Ch MOSFET | N-Ch, P-Ch MOSFET | N-Ch MOSFET | N-Ch, P-Ch MOSFET | N-Ch, P-Ch MOSFET |
| Supply Voltage Range | 4.5V ~ 35V | 4.5V ~ 35V | 6V ~ 20V | 6V ~ 20V | 4.5V ~ 20V | 4.5V ~ 20V | 4.5V ~ 18V | 4.5V ~ 18V |
| Logic Voltage VIL / VIH | 0.8V / 2.5V | 0.8V / 3.0V | 0.8V / 2.7V | 0.8V / 2.5V | 0.8V / 2.4V | 0.8V / 2.4V | 0.8V / 2.4V | 0.8V / 2.4V |
| Peak Output Current (Source / Sink) | 4A / 4A | 4A / 4A | 2.3A / 3.3A | 2.3A / 3.3A | 3A / 3A | 1.5A / 1.5A | 2A / 2A | 2A / 2A |
| Input Type | Inverting | Inverting | Inverting | Inverting | Inverting | Inverting | Inverting | Inverting |
| Rise / Fall Time (Typical) | 16ns / 13ns | 9ns / 8ns | 15ns / 10ns | 25ns / 25ns | 11ns / 11ns | 20ns / 18ns | 25ns / 20ns | 25ns / 20ns |
| Operating Temperature Range | -55°C ~ 150°C (TJ) | -40°C ~ 125°C (TA) | -40°C ~ 150°C (TJ) | -40°C ~ 150°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | 0°C ~ 70°C (TA) | -40°C ~ 85°C (TA) |
| RoHS Status | Not specified | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | MSL 1 | MSL 1 | MSL 2 | MSL 2 | MSL 3 | MSL 2 | MSL 1 | MSL 1 |
Engineering Selection Recommendations
Primary Substitute - IXDI604SI (IXYS): The IXDI604SI is the direct functional equivalent from the same manufacturer. It maintains identical supply voltage range (4.5V ~ 35V), equivalent peak output current (4A / 4A), and supports the same gate types (IGBT, N-Channel, P-Channel MOSFET). The IXDI604SI features an exposed pad variant (8-SOIC-EP) for improved thermal performance and is currently in active production status. Operating temperature range is -40°C to 125°C (TA), which covers the majority of industrial applications. This part is recommended as the primary replacement for IXDI404SI in new designs and production continuity.
Secondary Substitute - MIC4123YME-TR (Microchip Technology): The MIC4123YME-TR offers active product status with robust supply voltage range (4.5V ~ 20V) and peak output current of 3A / 3A. The exposed pad package (8-SOIC-EP) provides thermal advantages. Operating temperature range of -40°C to 125°C (TJ) supports industrial applications. This part is suitable for applications where the full 35V supply voltage of the IXDI404SI is not required. Microchip's active manufacturing status ensures long-term availability.
Tertiary Substitute - IRS4426STRPBF (Infineon Technologies): The IRS4426STRPBF is currently in active production with supply voltage range of 6V ~ 20V and peak output current of 2.3A / 3.3A. Operating temperature range extends to 150°C (TJ), matching the upper thermal limit of the IXDI404SI. This part is applicable for applications operating within the 6V to 20V supply window. Infineon's active status provides supply chain continuity.
Limited Substitutes - MAX626 Series (Analog Devices): The MAX626CSA+T and MAX626ESA+ variants offer active product status but with reduced supply voltage range (4.5V ~ 18V) and lower peak output current (2A / 2A). Operating temperature ranges are restricted to 0°C ~ 70°C (TA) and -40°C ~ 85°C (TA) respectively, limiting suitability for extended temperature applications. These parts are applicable only for consumer and commercial temperature range applications with lower current requirements.
Not Recommended - MIC4126YME (Microchip Technology): The MIC4126YME supports only N-Channel MOSFET gate types, excluding IGBT and P-Channel MOSFET compatibility. Peak output current is reduced to 1.5A / 1.5A. This part is not suitable as a direct substitute for IXDI404SI applications requiring IGBT or P-Channel MOSFET support.
Not Recommended - IR4426SPBF (Infineon Technologies): This part is classified as obsolete, providing no advantage over the IXDI404SI in terms of product lifecycle. Supply voltage range (6V ~ 20V) and peak output current (2.3A / 3.3A) are also reduced compared to the original part.
Frequently Asked Questions (FAQ)
Q: Can the IXDI604SI directly replace the IXDI404SI in existing designs?
A: The IXDI604SI is functionally equivalent to the IXDI404SI with identical electrical specifications for supply voltage (4.5V ~ 35V), peak output current (4A / 4A), and gate type support (IGBT, N-Channel, P-Channel MOSFET). The primary difference is the exposed pad variant (8-SOIC-EP) which provides improved thermal performance. Pin-to-pin compatibility must be verified against your specific PCB layout. The IXDI604SI is the recommended direct replacement.
Q: What is the significance of the exposed pad (EP) in the 8-SOIC-EP package?
A: The exposed pad provides a direct thermal path to the PCB, reducing junction temperature during operation. This is beneficial in high-frequency switching applications where thermal management is critical. Standard 8-SOIC packages without exposed pads rely on lead frame conduction for heat dissipation. If your design includes thermal vias connected to the exposed pad, the 8-SOIC-EP variants (IXDI604SI, MIC4123YME-TR, MIC4126YME) will provide superior thermal performance.
Q: Why do some substitutes have reduced supply voltage ranges?
A: Different manufacturers design gate drivers for specific application segments. The IXDI404SI's 4.5V ~ 35V range supports high-voltage industrial applications including 24V, 48V, and higher bus voltages. Substitutes like the MAX626 series (4.5V ~ 18V) and IR4426 series (6V ~ 20V) are optimized for lower voltage applications. Selection must match your system's supply voltage requirements.
Q: Can I use a substitute with lower peak output current?
A: Peak output current determines the gate charge delivery speed and switching frequency capability. The IXDI404SI provides 4A source and 4A sink current. Substitutes with lower ratings (2A, 2.3A, or 3A) will have slower gate drive transitions and may not be suitable for high-frequency switching applications. Verify that your gate charge requirements and switching frequency are compatible with the substitute's output current specification.
Q: What does "inverting input" mean for gate driver selection?
A: An inverting gate driver produces a LOW output when the input is HIGH, and a HIGH output when the input is LOW. This is the standard configuration for low-side drivers. All listed substitutes maintain inverting input logic, ensuring compatibility with existing control signal conditioning. Non-inverting drivers would require circuit redesign.
Q: Are all substitutes RoHS3 compliant?
A: All active substitute parts listed are RoHS3 compliant. The IXDI404SI's RoHS status is not specified in the provided data. If RoHS compliance is a requirement for your application, the active substitutes (IXDI604SI, MIC4123YME-TR, IRS4426STRPBF, MAX626 series) provide documented compliance. Obsolete parts (IR4426SPBF) may have limited compliance documentation.
Q: What is Moisture Sensitivity Level (MSL) and why does it matter?
A: MSL indicates the maximum time a component can be exposed to ambient moisture before soldering. MSL 1 (unlimited) parts like IXDI404SI and IXDI604SI have no time restrictions and are suitable for long-term storage. MSL 2 and MSL 3 parts require controlled storage conditions and have time limits (1 year and 168 hours respectively) before baking is required. For production environments with extended component storage, MSL 1 parts are preferred.
Q: Can I substitute a part with a higher operating temperature range?
A: Yes, a substitute with a higher temperature range provides additional design margin. The IXDI404SI operates to 150°C (TJ). Substitutes like IRS4426STRPBF also reach 150°C (TJ), while others are limited to 125°C or lower. If your application operates near the upper temperature limit, verify that the substitute's maximum rating meets or exceeds your requirements.
Q: What packaging considerations apply when switching from IXDI404SI to IXDI604SI?
A: Both parts use the 8-SOIC form factor with identical pin pitch and body dimensions (0.154", 3.90mm width). The IXDI604SI variant includes an exposed pad (8-SOIC-EP), which adds a thermal pad on the bottom of the package. If your PCB layout includes thermal vias under the exposed pad, the IXDI604SI will provide improved thermal performance. If no thermal vias are present, both packages are mechanically and electrically interchangeable.
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