IRS2123SPBF Equivalent & Substitute Parts

Part Overview

The IRS2123SPBF is a high-side gate driver IC manufactured by Infineon Technologies, designed for driving IGBT and N-Channel MOSFET devices in power management applications. This component operates with a supply voltage range of 10V to 20V and delivers peak output currents of 500mA (source and sink). The device is packaged in an 8-SOIC form factor with a maximum bootstrap voltage rating of 600V.

The IRS2123SPBF is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for applications utilizing this gate driver topology.

Substiute Parts

IRS2123SPBF

Infineon TechnologiesIn Stock: 3782IRS2123SPBF Datasheet

Current PartRFQ

IRS25752LTRPBF

Infineon TechnologiesIn Stock: 11430IRS25752LTRPBF Datasheet

MFR RecommendedRFQ

FAN7083MX-GF085

Fairchild SemiconductorIn Stock: 1303FAN7083MX-GF085 Datasheet

MFR RecommendedRFQ

FAN7085M-GF085

onsemiIn Stock: 1872FAN7085M-GF085 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the IRS2123SPBF is determined by the following critical parameters:

• Driven Configuration: Must be High-Side
• Channel Type: Must be Single
• Input Type: Must be Non-Inverting (functional equivalence requirement)
• Gate Type: Must support IGBT and/or N-Channel MOSFET
• High Side Voltage - Max (Bootstrap): Must meet or exceed 600V
• Supply Voltage Range: Must encompass or overlap the 10V ~ 20V requirement
• Package / Case: 8-SOIC form factor preferred for direct PCB compatibility
• Mounting Type: Surface Mount

Based on these criteria, three substitute parts are identified:

1. IRS25752LTRPBF (Infineon Technologies) – Active product with enhanced specifications in a smaller SOT-23-6 package
2. FAN7083MX-GF085 (Fairchild Semiconductor) – Active product in matching 8-SOIC package with automotive qualification
3. FAN7085M-GF085 (onsemi) – Obsolete product with inverting input logic (functional difference noted)

Parameter Comparison

Engineering Selection Recommendations

IRS25752LTRPBF is the preferred active substitute from Infineon Technologies. This part maintains the same manufacturer lineage and bootstrap voltage rating of 600V. The device is currently in active production status with ROHS3 compliance and superior moisture sensitivity rating (MSL 1). The SOT-23-6 package requires PCB layout modification compared to the original 8-SOIC footprint. Peak output current specifications are reduced (160mA source, 240mA sink) relative to the IRS2123SPBF; applications requiring the full 500mA output capability must evaluate load requirements accordingly. Operating temperature range extends to -55°C, providing enhanced low-temperature performance.

FAN7083MX-GF085 is an alternative active substitute in the matching 8-SOIC package, eliminating PCB layout redesign. This Fairchild Semiconductor device maintains identical supply voltage range (10V ~ 20V) and bootstrap voltage rating (600V). The part carries AEC-Q100 automotive qualification and is actively produced. Peak output current is reduced (200mA source, 400mA sink). Operating temperature maximum is limited to 125°C (TA) compared to 150°C (TJ) of the original part. Rise and fall time characteristics differ significantly (200ns rise, 25ns fall).

FAN7085M-GF085 is not recommended as a direct substitute. Although this onsemi device shares the 8-SOIC package and similar output current capability (450mA, 450mA), it employs inverting input logic, requiring circuit redesign. The bootstrap voltage maximum is reduced to 300V, which does not meet the 600V specification of the original part. This device is also classified as obsolete.

Frequently Asked Questions (FAQ)

Q: Can IRS25752LTRPBF replace IRS2123SPBF without circuit modification?

A: The IRS25752LTRPBF is functionally equivalent in terms of driven configuration, channel type, input logic, and gate type support. However, the package change from 8-SOIC to SOT-23-6 requires PCB layout modification. Peak output current is reduced from 500mA to 160mA (source) and 240mA (sink); applications must confirm that load requirements do not exceed these specifications.

Q: Why is FAN7085M-GF085 listed if it has a lower bootstrap voltage rating?

A: FAN7085M-GF085 is included in the substitute list based on the provided input data. However, the 300V maximum bootstrap voltage does not meet the 600V requirement of the IRS2123SPBF. This part is not suitable for applications requiring the full 600V bootstrap voltage specification.

Q: What is the impact of the input type difference in FAN7085M-GF085?

A: FAN7085M-GF085 uses inverting input logic, whereas the IRS2123SPBF uses non-inverting logic. This functional difference requires modification to the gate driver control circuit and is not a direct pin-compatible substitute.

Q: Does package selection affect performance?

A: Package selection affects PCB layout and thermal management. The 8-SOIC package (IRS2123SPBF, FAN7083MX-GF085) and SOT-23-6 package (IRS25752LTRPBF) have different thermal characteristics and board space requirements. The SOT-23-6 package is smaller but may have different thermal dissipation properties depending on PCB design.

Q: Are there compliance or qualification differences between substitutes?

A: IRS25752LTRPBF is ROHS3 compliant with MSL 1 rating. FAN7083MX-GF085 carries AEC-Q100 automotive qualification. FAN7085M-GF085 is ROHS3 compliant with MSL 3 rating. The original IRS2123SPBF has MSL 3 rating with no specified RoHS status. Application requirements for automotive or environmental compliance should guide substitute selection.

Q: What are the temperature operating range differences?

A: IRS25752LTRPBF extends to -55°C minimum (versus -40°C for IRS2123SPBF) and maintains 150°C maximum. FAN7083MX-GF085 is limited to 125°C maximum (TA) compared to 150°C (TJ) of the original part. FAN7085M-GF085 matches the original -40°C to 150°C range. Temperature requirements should be evaluated against application specifications.