AON7436 Equivalent & Substitute Parts

Part Overview

The AON7436 is an N-Channel MOSFET manufactured by Alpha & Omega Semiconductor Inc., rated for 20V drain-to-source voltage with continuous drain current of 9A (Ta) and 23A (Tc). This device is packaged in an 8-DFN-EP (3x3) surface mount configuration and is designed for applications requiring efficient switching and power management in compact form factors.

The AON7436 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this component.

Substiute Parts

AON7436

Alpha & Omega Semiconductor Inc.In Stock: 1762AON7436 Datasheet

Current PartRFQ

DMN3018SFG-13

Diodes IncorporatedIn Stock: 23511DMN3018SFG-13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AON7436 are identified based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• FET Type: N-Channel topology
• Technology: MOSFET (Metal Oxide) construction
• Drain to Source Voltage (Vdss): Equal to or greater than 20V
• Continuous Drain Current: Capable of supporting application requirements
• On-State Resistance (Rds On): Comparable performance characteristics
• Gate Threshold Voltage (Vgs(th)): Compatible gate drive requirements
• Operating Temperature Range: Minimum -55°C to 150°C (TJ)
• Mounting Type: Surface Mount
• Package Compatibility: 8-pin DFN or equivalent footprint

The DMN3018SFG-13 qualifies as a substitute based on these parameters. While it features a higher Vdss rating (30V versus 20V), this represents an enhancement that does not compromise compatibility. The device maintains N-Channel MOSFET topology, surface mount configuration, and compatible operating temperature range. The higher voltage rating provides additional design margin for applications with transient overvoltage conditions.

Parameter Comparison

Engineering Selection Recommendations

DMN3018SFG-13 Substitution Basis:

The DMN3018SFG-13 is an active product manufactured by Diodes Incorporated, providing long-term supply chain continuity compared to the obsolete AON7436. Both devices share identical operating temperature ranges (-55°C to 150°C TJ), moisture sensitivity classification (MSL 1), and regulatory compliance status (REACH Unaffected, ECCN EAR99).

The DMN3018SFG-13 features a higher Vdss rating (30V versus 20V), which is compatible with applications designed for the AON7436. The continuous drain current at Ta (8.5A) is comparable to the AON7436 (9A), supporting equivalent current-handling capacity. On-state resistance characteristics (21 mOhm @ 10A, 10V versus 19 mOhm @ 9A, 10V) remain within acceptable performance parameters for most switching applications.

Both devices utilize identical package geometry (8-PowerVDFN), ensuring mechanical and electrical compatibility with existing PCB layouts. The DMN3018SFG-13 is supplied in Tape & Reel packaging with substantial inventory availability (23,456 pieces), supporting production requirements.

The primary design consideration is the gate threshold voltage difference (Vgs(th) 2.1V for DMN3018SFG-13 versus 1.1V for AON7436). Applications requiring specific gate drive voltage levels must verify compatibility with existing driver circuits.

Frequently Asked Questions (FAQ)

Q: Can the DMN3018SFG-13 directly replace the AON7436 in existing designs?

A: The DMN3018SFG-13 is mechanically and electrically compatible with the AON7436 in the 8-PowerVDFN package. Both devices share identical operating temperature ranges and moisture sensitivity classifications. Gate drive circuits must accommodate the higher gate threshold voltage (2.1V versus 1.1V) of the DMN3018SFG-13. The higher Vdss rating (30V versus 20V) provides additional voltage margin without compromising functionality.

Q: What are the key differences between these two MOSFETs?

A: The primary differences are: (1) Product Status—AON7436 is obsolete while DMN3018SFG-13 is active; (2) Vdss rating—30V versus 20V; (3) Gate threshold voltage—2.1V versus 1.1V; (4) Gate charge—13.2 nC versus 15 nC; (5) Continuous drain current at Ta—8.5A versus 9A. These differences do not prevent substitution in most applications but require circuit verification.

Q: Are the packages identical?

A: Both devices use the 8-PowerVDFN package with identical 3x3mm footprint dimensions. PCB layouts designed for the AON7436 accommodate the DMN3018SFG-13 without modification.

Q: What is the impact of the higher gate threshold voltage on circuit operation?

A: The DMN3018SFG-13 requires a higher gate drive voltage (2.1V minimum versus 1.1V minimum) to achieve conduction. Gate driver circuits must supply sufficient voltage to ensure reliable device switching. Applications with marginal gate drive voltage may require circuit adjustment or alternative component selection.

Q: Are there regulatory or compliance differences between these parts?

A: Both devices share identical REACH status (REACH Unaffected), ECCN classification (EAR99), and moisture sensitivity level (MSL 1). No regulatory barriers exist to substitution.

Q: What is the significance of the higher Vdss rating on the DMN3018SFG-13?

A: The 30V Vdss rating on the DMN3018SFG-13 exceeds the 20V requirement of the AON7436, providing additional design margin for transient overvoltage conditions. This enhancement does not negatively impact applications designed for 20V operation.

Q: How do the on-state resistance characteristics compare?

A: The AON7436 exhibits 19 mOhm at 9A and 10V gate voltage, while the DMN3018SFG-13 exhibits 21 mOhm at 10A and 10V gate voltage. The difference is approximately 2 mOhm, representing a 10.5% increase in on-state resistance. This modest increase may affect power dissipation calculations in high-current applications.

Q: Is the DMN3018SFG-13 available in the same packaging format?

A: The DMN3018SFG-13 is supplied in Tape & Reel (TR) packaging, while the AON7436 packaging format was not specified in the provided data. Both devices use identical 8-PowerVDFN case geometry, ensuring footprint compatibility regardless of tape format.