AON7220 Equivalent & Substitute Parts

Part Overview

The AON7220 is an N-Channel MOSFET rated for 25V drain-to-source voltage with continuous drain current of 37A (Ta) and 50A (Tc). This device is housed in a Surface Mount 8-DFN-EP (3.3x3.3) package and is designed for applications requiring efficient switching and power management in compact form factors.

The AON7220 is classified as Obsolete. Locating equivalent or substitute components is necessary to support ongoing production requirements, field repairs, and design continuity for systems currently utilizing this part.

Substiute Parts

AON7220

Alpha & Omega Semiconductor Inc.In Stock: 1459AON7220 Datasheet

Current PartRFQ

AON7508

Alpha & Omega Semiconductor Inc.In Stock: 5069AON7508 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AON7220 is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• FET Type: Must be N-Channel MOSFET
• Technology: Must be Metal Oxide MOSFET
• Drain to Source Voltage (Vdss): Substitute must equal or exceed 25V
• Continuous Drain Current: Substitute must support equivalent or higher current ratings at both Ta and Tc conditions
• On-State Resistance (Rds On): Substitute must not exceed the specified maximum value to maintain switching efficiency
• Gate Charge (Qg): Lower or equivalent values preferred to maintain drive circuit compatibility
• Input Capacitance (Ciss): Lower or equivalent values preferred for gate drive performance
• Operating Temperature Range: Must support -55°C to 150°C (TJ)

Mechanical Compatibility Criteria:

• Mounting Type: Must be Surface Mount
• Package Type: Must be 8-DFN-EP or compatible DFN variant
• Moisture Sensitivity Level: Must be MSL 1 or equivalent

The AON7508 meets these substitution criteria as an N-Channel MOSFET with higher voltage rating (30V), compatible package configuration, and equivalent electrical performance characteristics within the specified operating envelope.

Parameter Comparison

Engineering Selection Recommendations

AON7220 Status: Obsolete. This part is no longer in active production and is not recommended for new designs.

AON7508 Status: Not For New Designs. This substitute part is available in inventory but carries a "Not For New Designs" designation, indicating it is suitable for legacy system support and field replacement applications only.

Compliance and Certifications:

• AON7220: REACH Unaffected, ECCN EAR99, HTSUS 8541.29.0095
• AON7508: ROHS3 Compliant, REACH Unaffected, ECCN EAR99, HTSUS 8541.29.0095

The AON7508 provides electrical substitution with the following considerations:

The AON7508 features a higher Vdss rating (30V versus 25V), which provides additional voltage margin in applications. However, the continuous drain current is lower (26A Ta / 32A Tc versus 37A Ta / 50A Tc). The on-state resistance remains equivalent at 3 mOhm, and gate charge is reduced to 40 nC, which may improve gate drive efficiency. Input capacitance is significantly lower (1835 pF versus 3554 pF), reducing switching losses.

Package dimensions differ slightly (3x3 versus 3.3x3.3), requiring PCB layout verification for mechanical fit and thermal performance.

Both parts maintain identical operating temperature ranges and moisture sensitivity levels, ensuring thermal and environmental compatibility.

Frequently Asked Questions (FAQ)

Q: Can the AON7508 directly replace the AON7220 in existing designs?

A: Electrical substitution is possible with design review. The AON7508 has a higher voltage rating (30V) and lower current rating (26A Ta / 32A Tc). Applications operating below 26A continuous current at Ta conditions are compatible. The reduced gate charge and input capacitance may improve switching performance. PCB layout must accommodate the slightly smaller package footprint (3x3 versus 3.3x3.3).

Q: What are the key differences between AON7220 and AON7508?

A: The primary differences are: Vdss (25V versus 30V), continuous drain current (37A/50A versus 26A/32A), gate charge (52 nC versus 40 nC), input capacitance (3554 pF versus 1835 pF), and package size (3.3x3.3 versus 3x3). Both maintain identical Rds On, operating temperature range, and MSL rating.

Q: Are there thermal performance implications when substituting the AON7508 for the AON7220?

A: The AON7508 has lower power dissipation ratings (3.1W Ta / 62.5W Tc versus 6.2W Ta / 83W Tc). Applications requiring the full thermal capacity of the AON7220 may experience reduced thermal headroom with the AON7508. Thermal analysis is required for high-power applications.

Q: Does the package size difference affect PCB compatibility?

A: The AON7508 uses an 8-DFN-EP (3x3) package versus the AON7220's 8-DFN-EP (3.3x3.3). The smaller footprint requires PCB layout verification to ensure pad alignment and thermal via placement remain within design specifications. The pin configuration remains compatible.

Q: What is the inventory status for these parts?

A: AON7220 has 1420 pieces in stock (New Original). AON7508 has 4966 pieces in stock (New Original). Both are available for immediate procurement.

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

A: AON7220 carries REACH Unaffected status. AON7508 is ROHS3 Compliant and REACH Unaffected. Both share identical ECCN (EAR99) and HTSUS (8541.29.0095) classifications. Applications requiring ROHS3 compliance should use the AON7508.