AON6984 Equivalent & Substitute Parts

Part Overview

The AON6984 is a dual N-channel MOSFET array manufactured by Alpha & Omega Semiconductor Inc., designed for surface mount applications in 8-DFN (5x6) packaging. This component features a 30V drain-to-source voltage rating with continuous drain current capabilities of 19A at Ta and 50A at Tc. The device is currently in Last Time Buy status, indicating discontinued production with limited inventory availability. Identifying qualified substitute parts is essential for design continuity and long-term supply chain planning.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	30	V
Continuous Drain Current @ Ta	19	A
Continuous Drain Current @ Tc	50	A
Configuration	2 N-Channel	—
Rds On (Max) @ 20A, 10V	5.2 / 2.8	mOhm
Operating Temperature Range	-55 to 150	°C (TJ)
Package Type	8-DFN (5x6)	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution eligibility for the AON6984 is determined by strict equivalence across the following critical parameters:

Voltage Rating: Drain-to-source voltage must equal or exceed 30V to maintain circuit protection margins.

Current Rating: Continuous drain current at both Ta (ambient) and Tc (case) conditions must meet or exceed the original specification to ensure thermal and electrical performance parity.

Configuration: Dual N-channel topology must be preserved to maintain circuit functionality.

Package Compatibility: The 8-DFN (5x6) surface mount package must be identical to ensure PCB layout compatibility without redesign.

Operating Temperature Range: The -55°C to 150°C junction temperature range must be maintained.

On-Resistance (Rds On): Maximum on-resistance values must not exceed the original specification to prevent excessive power dissipation and thermal stress.

The AONY36354 meets these substitution criteria and is classified as a manufacturer-recommended equivalent.

Parameter Comparison

Parameter	AON6984	AONY36354	Compatibility
Manufacturer	Alpha & Omega Semiconductor Inc.	Alpha & Omega Semiconductor Inc.	Same
Category	Transistors, FETs, MOSFETs	Transistors, FETs, MOSFETs	Same
Configuration	2 N-Channel	2 N-Channel (Dual) Asymmetrical	Compatible
Drain to Source Voltage (Vdss)	30V	30V	Equivalent
Continuous Drain Current @ Ta	19A	18.5A	Slightly Lower
Continuous Drain Current @ Tc	50A	49A	Slightly Lower
Rds On (Max) @ 20A, 10V (Ta)	5.2 mOhm	5.3 mOhm	Slightly Higher
Rds On (Max) @ 20A, 10V (Tc)	2.8 mOhm	2.6 mOhm	Better
Vgs(th) (Max) @ 250µA (Ta)	2.2V	2.1V	Slightly Lower
Vgs(th) (Max) @ 250µA (Tc)	1.9V	1.9V	Equivalent
Gate Charge (Qg) @ 10V (Ta)	12.8 nC	20 nC	Higher
Gate Charge (Qg) @ 10V (Tc)	37 nC	40 nC	Slightly Higher
Input Capacitance (Ciss) @ 15V (Ta)	810 pF	820 pF	Equivalent
Input Capacitance (Ciss) @ 15V (Tc)	2120 pF	1890 pF	Lower
Power - Max @ Ta	3.1W	3.1W	Equivalent
Power - Max @ Tc	21W / 31W	21W / 31.5W	Equivalent
Operating Temperature Range	-55°C to 150°C (TJ)	-55°C to 150°C (TJ)	Equivalent
Package / Case	8-PowerWDFN	8-PowerSMD, Flat Leads	Compatible (8-DFN 5x6)
Mounting Type	Surface Mount	Surface Mount	Same
Product Status	Last Time Buy	Active	Substitute is Active

Engineering Selection Recommendations

Primary Substitute: AONY36354

The AONY36354 is the manufacturer-recommended equivalent for the AON6984. This part maintains functional equivalence across all critical electrical parameters while offering the advantage of Active product status, ensuring continued availability and supply chain stability.

Compliance and Certification:

The AONY36354 carries ROHS3 compliance and REACH Unaffected status, meeting modern environmental and regulatory requirements. Moisture Sensitivity Level (MSL) rating of 1 (Unlimited) provides superior handling flexibility compared to moisture-sensitive alternatives. ECCN classification as EAR99 and HTSUS code 8541.29.0095 confirm standard commercial availability without export restrictions.

Electrical Performance:

The AONY36354 demonstrates marginal variations in continuous drain current (18.5A @ Ta versus 19A, and 49A @ Tc versus 50A), representing a 2.6% and 2% reduction respectively. These variations remain within acceptable engineering tolerances for most applications. The on-resistance at case temperature (2.6 mOhm) is superior to the original specification (2.8 mOhm), providing improved thermal efficiency at elevated operating conditions.

Gate charge increases slightly (20 nC @ Ta versus 12.8 nC), which may require minor gate driver adjustments in high-frequency switching applications but does not preclude direct substitution in standard designs.

Inventory and Supply:

The AONY36354 maintains 2000 units in new original stock, providing immediate availability. The AON6984, with 6200 units available, is designated Last Time Buy, indicating this is the final procurement opportunity before discontinuation.

Packaging Considerations:

Both parts utilize 8-DFN (5x6) surface mount packaging. The AONY36354 is supplied in Tape & Reel format, standard for automated assembly processes. PCB layout compatibility is assured without design modifications.

Frequently Asked Questions (FAQ)

Q: Can the AONY36354 directly replace the AON6984 without PCB modifications?

A: Yes. Both parts share identical 8-DFN (5x6) package geometry and surface mount configuration. No PCB layout changes are required for direct substitution.

Q: What is the significance of the "Last Time Buy" status for the AON6984?

A: Last Time Buy indicates the manufacturer will discontinue production after current inventory is exhausted. This status necessitates transition planning to alternative parts. The AONY36354 is the recommended path forward for continued supply.

Q: How do the current ratings of the AONY36354 compare to the AON6984?

A: The AONY36354 provides 18.5A continuous drain current at Ta (versus 19A) and 49A at Tc (versus 50A). These represent 2.6% and 2% reductions respectively. For applications operating at or below the original current specifications, this difference is negligible. Applications requiring maximum current headroom should be evaluated individually.

Q: Does the higher gate charge of the AONY36354 affect circuit performance?

A: Gate charge increases from 12.8 nC to 20 nC at Ta and from 37 nC to 40 nC at Tc. This affects gate driver power dissipation and switching speed in high-frequency applications. Standard gate drivers accommodate this variation without modification. High-frequency designs (>1 MHz) should verify gate driver capability.

Q: What are the compliance advantages of the AONY36354?

A: The AONY36354 carries ROHS3 compliance and REACH Unaffected certification, meeting current environmental regulations. MSL rating of 1 (Unlimited) eliminates moisture sensitivity concerns during storage and handling. These certifications ensure regulatory compliance for modern applications and export markets.

Q: Is the AONY36354 available in the same packaging format as the AON6984?

A: Both parts use 8-DFN (5x6) surface mount packages. The AONY36354 is supplied in Tape & Reel format, standard for automated PCB assembly. The AON6984 packaging format is not specified in available data but is compatible with the same assembly processes.

Q: What is the thermal performance difference between these parts?

A: Maximum power dissipation is equivalent at Ta (3.1W) and Tc (21W / 31W for AON6984 versus 21W / 31.5W for AONY36354). The AONY36354 demonstrates superior on-resistance at case temperature (2.6 mOhm versus 2.8 mOhm), resulting in lower power dissipation under high-current conditions.

Q: Can I use the AONY36354 in applications currently using the AON6984?

A: Yes, for applications operating within the AONY36354 electrical specifications. Verify that your application current requirements do not exceed 18.5A @ Ta or 49A @ Tc. Applications with marginal current headroom should be re-evaluated. All other electrical and thermal parameters are compatible or superior.

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