IR4427STR Low-Side Gate Driver IC Equivalent & Substitute Parts

Part Overview

The IR4427STR 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 fast switching characteristics (15ns rise time, 10ns fall time).

The IR4427STR is classified as obsolete, which necessitates identification of equivalent and substitute parts for new designs or production continuity. Active alternatives from Infineon and other manufacturers provide comparable or enhanced functionality while maintaining compatibility with existing circuit topologies.

Substiute Parts

IR4427STR

Infineon TechnologiesIn Stock: 1779IR4427STR Datasheet

Current PartRFQ

IR4427STRPBF

Infineon TechnologiesIn Stock: 73400IR4427STRPBF Datasheet

DirectRFQ

ADP3654ARDZ-RL

Analog Devices Inc.In Stock: 73090ADP3654ARDZ-RL Datasheet

MFR RecommendedRFQ

MIC4124YME

Microchip TechnologyIn Stock: 1407MIC4124YME Datasheet

MFR RecommendedRFQ

MIC4127YME

Microchip TechnologyIn Stock: 2251MIC4127YME Datasheet

MFR RecommendedRFQ

MIC4424YM

Microchip TechnologyIn Stock: 22631MIC4424YM Datasheet

MFR RecommendedRFQ

MIC4424YM-TR

Microchip TechnologyIn Stock: 42661MIC4424YM-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IR4427STR is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution 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: Non-Inverting (all substitutes must match)
• Package / Case: 8-SOIC form factor (all substitutes must match)
• Mounting Type: Surface Mount (all substitutes must match)

Electrical Compatibility Parameters:

• Voltage - Supply: Must encompass or overlap the 6V ~ 20V range
• Current - Peak Output: Must meet or exceed 2.3A source and 3.3A sink requirements
• Logic Voltage (VIL, VIH): Must be compatible with 0.8V and 2.7V thresholds
• Operating Temperature: Must support -40°C ~ 150°C range or equivalent industrial specification

Identified Substitute Parts:

1. IR4427STRPBF (Infineon Technologies) – Direct equivalent with active product status and RoHS3 compliance
2. ADP3654ARDZ-RL (Analog Devices Inc.) – Enhanced specifications with higher output current (4A/4A) and exposed pad variant
3. MIC4124YME (Microchip Technology) – Supports both N-Channel and P-Channel MOSFETs with 3A output current
4. MIC4127YME (Microchip Technology) – Lower output current (1.5A/1.5A) with extended supply voltage range
5. MIC4424YM (Microchip Technology) – Supports both N-Channel and P-Channel MOSFETs with 3A output current and unlimited MSL
6. MIC4424YM-TR (Microchip Technology) – Tape and reel packaging variant of MIC4424YM with identical electrical specifications

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (Highest Compatibility): IR4427STRPBF is the primary substitute for IR4427STR. Both devices are manufactured by Infineon Technologies and share identical electrical specifications and operating temperature range. IR4427STRPBF maintains active product status and achieves ROHS3 compliance, making it suitable for new production and long-term availability. The only difference is packaging format (Cut Tape & Digi-Reel vs. standard packaging) and MSL rating (2 vs. 1).

Enhanced Performance Alternatives: ADP3654ARDZ-RL (Analog Devices) provides higher peak output current (4A source and sink) and faster switching times (10ns rise and fall), beneficial for applications requiring higher gate drive capability. The exposed pad variant improves thermal dissipation. Supply voltage range is reduced to 4.5V ~ 18V, which may limit use in systems requiring 20V operation.

Microchip Technology Options: MIC4424YM and MIC4424YM-TR offer the widest availability (22,600 and 42,600 units respectively) with unlimited MSL rating and extended operating temperature support (-40°C ~ 150°C). These devices support both N-Channel and P-Channel MOSFETs and deliver 3A output current. Switching times are slower (28ns rise, 32ns fall) compared to the original IR4427STR.

MIC4124YME provides comparable 3A output current with faster switching (11ns rise and fall) and supports both N-Channel and P-Channel MOSFETs. Operating temperature is limited to -40°C ~ 125°C.

MIC4127YME is suitable only for applications with lower gate drive current requirements (1.5A source and sink) and slower switching tolerance (20ns rise, 18ns fall).

Compliance Considerations: All substitute parts except IR4427STR achieve ROHS3 compliance. For applications requiring RoHS compliance, IR4427STRPBF, ADP3654ARDZ-RL, MIC4124YME, MIC4127YME, MIC4424YM, and MIC4424YM-TR are all acceptable. All parts maintain REACH Unaffected status and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can IR4427STRPBF be used as a direct drop-in replacement for IR4427STR? A: Yes. IR4427STRPBF is electrically and functionally identical to IR4427STR with matching supply voltage (6V ~ 20V), output current (2.3A source, 3.3A sink), and operating temperature range (-40°C ~ 150°C). The primary difference is packaging format and active product status. PCB layout and circuit design require no modification.

Q: What are the key differences between Infineon and Microchip substitutes? A: Infineon IR4427STRPBF maintains exact electrical specifications. Microchip MIC4424YM and MIC4424YM-TR offer higher inventory availability and unlimited MSL rating but with slower switching times (28ns/32ns vs. 15ns/10ns). MIC4124YME provides faster switching (11ns) with 3A output current but limits operating temperature to 125°C. Selection depends on switching speed requirements and temperature operating range.

Q: Is the 8-SOIC-EP (exposed pad) variant compatible with standard 8-SOIC PCB layouts? A: The 8-SOIC-EP package is mechanically compatible with standard 8-SOIC footprints. The exposed pad provides additional thermal dissipation capability and should be connected to ground or thermal plane for optimal performance. Existing 8-SOIC layouts will function with 8-SOIC-EP devices, though thermal benefits are realized only if the PCB design includes the exposed pad connection.

Q: Which substitute offers the best performance improvement over IR4427STR? A: ADP3654ARDZ-RL delivers the highest peak output current (4A source and sink) and fastest switching times (10ns rise and fall). This provides superior gate drive capability and reduced switching losses. However, the supply voltage range is limited to 4.5V ~ 18V, which may not support applications requiring 20V operation.

Q: Are there any supply voltage compatibility issues with the substitutes? A: IR4427STRPBF maintains the original 6V ~ 20V range. ADP3654ARDZ-RL and MIC4424YM are limited to 4.5V ~ 18V, which excludes 20V operation. MIC4124YME and MIC4127YME support 4.5V ~ 20V, providing full compatibility. Verify system supply voltage specifications before selection.

Q: What is the impact of different MSL ratings on component handling? A: MSL 1 (Unlimited) devices like IR4427STR and MIC4424YM have no moisture sensitivity restrictions and can be stored indefinitely. MSL 2 (1 Year) devices like IR4427STRPBF require reflow within one year of opening the moisture barrier bag. MSL 3 (168 Hours) devices like ADP3654ARDZ-RL must be reflowed within 168 hours. For high-volume production with extended storage, MIC4424YM or MIC4424YM-TR are preferred.

Q: Can MIC4127YME be used in applications requiring 2.3A source and 3.3A sink output? A: No. MIC4127YME is rated for 1.5A source and sink, which is insufficient for applications requiring the full 2.3A/3.3A output capability of IR4427STR. Use MIC4124YME, MIC4424YM, MIC4424YM-TR, or ADP3654ARDZ-RL for equivalent or higher output current.

Q: What is the significance of the non-inverting input type across all substitutes? A: All substitute parts maintain non-inverting input configuration, meaning logic high input produces logic high output. This ensures direct compatibility with existing gate drive signal conditioning circuits. No signal inversion or additional logic circuitry is required for substitution.