FAN3223CMPX Low-Side Gate Driver IC Equivalent & Substitute Parts

Part Overview

The FAN3223CMPX is a low-side gate driver IC manufactured by onsemi, designed for driving N-Channel MOSFET gates in power management applications. This device features inverting logic, dual independent channels, and a compact 8-MLP (3x3) surface mount package. The FAN3223CMPX is currently classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. Substitute parts must maintain compatibility across supply voltage ranges, output current capabilities, and thermal operating specifications while accommodating different packaging formats.

Substiute Parts

FAN3223CMPX

onsemiIn Stock: 6135FAN3223CMPX Datasheet

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NCP81071AMNTXG

onsemiIn Stock: 58303NCP81071AMNTXG Datasheet

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MCP14E6-E/MF

Microchip TechnologyIn Stock: 7556MCP14E6-E/MF Datasheet

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MCP14E6T-E/MF

Microchip TechnologyIn Stock: 1191MCP14E6T-E/MF Datasheet

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MCP14E9-E/MF

Microchip TechnologyIn Stock: 789MCP14E9-E/MF Datasheet

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MCP14E9T-E/MF

Microchip TechnologyIn Stock: 771MCP14E9T-E/MF Datasheet

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UCC27523DSDR

Texas InstrumentsIn Stock: 992UCC27523DSDR Datasheet

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UCC27523DSDT

Texas InstrumentsIn Stock: 1966UCC27523DSDT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FAN3223CMPX are selected based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Driven Configuration: Low-Side (all substitutes match)
• Number of Drivers: 2 independent channels (all substitutes match)
• Input Type: Inverting logic (all substitutes match)
• Supply Voltage Range: Minimum 4.5V, maximum at least 18V
• Peak Output Current: Source and Sink capability of at least 5A
• Operating Temperature Range: Minimum -40°C, maximum at least 125°C
• Mounting Type: Surface Mount (all substitutes match)
• Gate Type Compatibility: N-Channel MOSFET or broader compatibility (IGBT, P-Channel support acceptable)

Substitutes are grouped into two categories:

Category A - Direct Pin-Compatible Replacements (8-WDFN Package):

• NCP81071AMNTXG (onsemi): Maintains identical 8-WDFN (3x3) package footprint, enhanced specifications
• UCC27523DSDR and UCC27523DSDT (Texas Instruments): 8-SON (3x3) package with equivalent footprint dimensions

Category B - Functional Equivalents (8-DFN-S Package):

• MCP14E6-E/MF, MCP14E6T-E/MF (Microchip Technology): 8-DFN-S (6x5) package, reduced output current (2A)
• MCP14E9-E/MF, MCP14E9T-E/MF (Microchip Technology): 8-DFN-S (6x5) package, moderate output current (3A)

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Pin-Compatible, Active Product Status):

NCP81071AMNTXG is the primary substitute for FAN3223CMPX. Both devices share identical 8-WDFN (3x3) package geometry, enabling direct PCB footprint compatibility. NCP81071AMNTXG maintains the required 5A source and sink output current, supports the 4.5V to 18V supply range, and extends the maximum operating temperature to 140°C. The device is currently in active production status with unlimited moisture sensitivity rating, ensuring long-term availability and supply chain stability.

UCC27523DSDR and UCC27523DSDT (Texas Instruments) provide equivalent electrical performance with 5A output current and identical supply voltage range. Both variants use 8-SON (3x3) packaging with equivalent footprint dimensions to the original 8-WDFN package. These devices are active products with ROHS3 compliance. The primary consideration is the MSL rating of 2 (1 Year), which requires controlled storage conditions compared to the unlimited MSL of the original part.

For Functional Equivalence (Different Package, Active Product Status):

MCP14E6-E/MF and MCP14E6T-E/MF (Microchip Technology) provide functional substitution with reduced output current capability (2A source/sink versus 5A). These devices are suitable for applications where gate drive current requirements do not exceed 2A. The 8-DFN-S (6x5) package requires PCB layout modification. Both variants are active products with ROHS3 compliance and unlimited MSL rating.

MCP14E9-E/MF and MCP14E9T-E/MF (Microchip Technology) offer intermediate output current (3A source/sink) with the same 8-DFN-S (6x5) package footprint. These devices are appropriate for applications requiring higher drive current than the MCP14E6 series but lower than the original 5A specification. Both variants are active products with ROHS3 compliance and unlimited MSL rating.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original FAN3223CMPX.

Frequently Asked Questions (FAQ)

Q: Can NCP81071AMNTXG be used as a direct drop-in replacement for FAN3223CMPX?

A: Yes. NCP81071AMNTXG shares the identical 8-WDFN (3x3) package footprint and pinout with FAN3223CMPX. Both devices support 5A source and sink output current, operate across the 4.5V to 18V supply range, and feature inverting dual-channel low-side gate driver architecture. No PCB layout modifications are required.

Q: What is the difference between UCC27523DSDR and UCC27523DSDT?

A: Both devices are functionally identical with 5A output current, 4.5V to 18V supply range, and 8-SON (3x3) packaging. The primary difference is packaging format: DSDR indicates Tape & Reel (TR) packaging, while DSDT also indicates Tape & Reel (TR) packaging. Both are suitable for high-volume production applications.

Q: Why do MCP14E6 and MCP14E9 series have lower output current ratings?

A: MCP14E6 devices provide 2A source/sink output current, while MCP14E9 devices provide 3A. These reduced ratings reflect the electrical design of these gate drivers. Applications requiring full 5A output current must use NCP81071AMNTXG or UCC27523 series devices.

Q: Can I use MCP14E6-E/MF or MCP14E9-E/MF if my application requires 5A output current?

A: No. These devices are rated for maximum 2A and 3A output current respectively. Using them in applications requiring 5A output current will result in insufficient gate drive current and potential MOSFET switching performance degradation. Use NCP81071AMNTXG or UCC27523 series for 5A applications.

Q: What is the impact of different package sizes on PCB design?

A: FAN3223CMPX, NCP81071AMNTXG, and UCC27523 series use 8-WDFN or 8-SON (3x3) packages with identical footprint dimensions, enabling direct PCB replacement without layout modification. MCP14E6 and MCP14E9 series use 8-DFN-S (6x5) packages with larger footprints, requiring PCB layout redesign and re-routing of signal traces.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance status, matching the regulatory compliance of the original FAN3223CMPX.

Q: What is the significance of MSL (Moisture Sensitivity Level) ratings?

A: FAN3223CMPX, NCP81071AMNTXG, MCP14E6, and MCP14E9 series have MSL 1 (Unlimited), allowing indefinite storage without moisture control. UCC27523 series has MSL 2 (1 Year), requiring controlled storage conditions and baking procedures if storage exceeds one year. For applications with extended inventory holding periods, MSL 1 rated devices are preferred.

Q: What is the operating temperature difference between FAN3223CMPX and substitute parts?

A: FAN3223CMPX operates to 125°C (TA - ambient temperature). NCP81071AMNTXG and UCC27523 series extend to 140°C (TJ - junction temperature). MCP14E6 and MCP14E9 series extend to 150°C (TJ). Higher temperature ratings provide additional thermal margin in high-power applications but do not affect functionality in standard operating conditions.