AO4622 Equivalent & Substitute Parts

Part Overview

The AO4622 is a complementary N and P-channel MOSFET array in 8-SOIC surface mount packaging, rated for 20V drain-to-source voltage with 2W maximum power dissipation. This device is classified as obsolete and no longer recommended for new designs. Identifying equivalent and substitute parts is necessary to support existing applications, facilitate design transitions, and ensure continued component availability for maintenance and production requirements.

Substiute Parts

AO4622

Alpha & Omega Semiconductor Inc.In Stock: 19454AO4622 Datasheet

Current PartRFQ

AO4630

Alpha & Omega Semiconductor Inc.In Stock: 12478AO4630 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AO4622 is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Package / Case: 8-SOIC surface mount form factor (0.154", 3.90mm Width)
• Configuration: N and P-Channel complementary pair
• Operating Temperature Range: -55°C to 150°C (TJ)
• Mounting Type: Surface Mount
• Moisture Sensitivity Level: 1 (Unlimited)

Electrical Performance Parameters:

• Drain to Source Voltage (Vdss): Must equal or exceed 20V
• Power - Max: Must equal or exceed 2W
• Rds On (Max): Lower or equal values indicate improved performance
• Vgs(th) (Max): Logic level gate threshold compatibility
• Gate Charge (Qg) and Input Capacitance (Ciss): Switching characteristics

The AO4630 qualifies as a direct substitute based on identical package, configuration, temperature range, and MSL rating. The AO4630 provides enhanced electrical performance with higher Vdss (30V) and improved current handling (5A, 7A), while maintaining the same 2W power rating and 8-SOIC package footprint.

Parameter Comparison

Engineering Selection Recommendations

AO4622 Status: Obsolete product, not recommended for new designs.

AO4630 Substitution: The AO4630 is the manufacturer-recommended substitute for the AO4622. Both devices share identical package geometry (8-SOIC), configuration (N and P-Channel complementary pair), operating temperature range (-55°C to 150°C), and moisture sensitivity classification (MSL 1). Both devices maintain REACH Unaffected status and EAR99 export classification.

The AO4630 is classified as "Not For New Designs," indicating it is also approaching end-of-life status. However, it provides superior electrical performance with 30V Vdss rating (versus 20V) and higher continuous drain current capability (5A, 7A), making it suitable for applications requiring enhanced voltage and current margins.

Both parts comply with identical regulatory classifications (REACH, ECCN, HTSUS) and are suitable for direct PCB footprint replacement without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the AO4630 be used as a direct replacement for the AO4622 in existing designs?

A: Yes. The AO4630 is electrically and mechanically compatible with the AO4622. Both devices use the 8-SOIC package with identical 0.154" (3.90mm) width, operate across the same temperature range (-55°C to 150°C), and feature complementary N and P-channel configuration. No PCB layout modifications are required.

Q: What are the key differences between the AO4622 and AO4630?

A: The primary differences are Vdss rating (20V versus 30V) and continuous drain current specification (not specified for AO4622 versus 5A, 7A for AO4630). The AO4630 provides higher voltage and current capability. Rds On values are comparable (23 mOhm versus 28 mOhm at similar operating points), and input capacitance is lower in the AO4630 (670 pF versus 1100 pF).

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

A: No. Both the AO4622 and AO4630 share identical REACH status (REACH Unaffected), ECCN classification (EAR99), and HTSUS code (8541.29.0095). Both devices have MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions.

Q: Why is the AO4630 also marked as "Not For New Designs"?

A: The AO4630 is in the later stages of its product lifecycle. While it remains available and suitable for existing applications and production support, Alpha & Omega Semiconductor Inc. does not recommend it for new design implementations. For new designs, consultation with the manufacturer regarding current-generation alternatives is advised.

Q: What is the significance of the 8-SOIC package specification?

A: The 8-SOIC (Small Outline Integrated Circuit) package is a surface mount form factor with 0.154" (3.90mm) width. This standardized package ensures mechanical and electrical compatibility between the AO4622 and AO4630, allowing direct substitution without PCB redesign or rework.

Q: How do the gate charge and input capacitance specifications affect substitution?

A: Gate charge (Qg) and input capacitance (Ciss) determine switching speed and gate drive requirements. The AO4630 exhibits slightly higher gate charge (20 nC versus 18 nC) but lower input capacitance (670 pF versus 1100 pF). These differences are minor and do not preclude substitution in standard applications. Circuit-level gate drive analysis may be required for high-frequency switching applications.

Q: What does the Vgs(th) specification indicate for substitution purposes?

A: Vgs(th) is the gate-source threshold voltage at which the MOSFET begins to conduct. Both devices feature logic-level gate operation with Vgs(th) values below 2V, ensuring compatibility with standard digital logic signal levels. The AO4630 exhibits a lower threshold (1.45V versus 2V), which may provide improved gate drive margin in some applications.