AOZ1237QI-01 Equivalent & Substitute Parts

Part Overview

The AOZ1237QI-01 is a buck switching regulator IC from Alpha & Omega Semiconductor Inc., part of the EZBuck™ series. It delivers positive adjustable output voltage with 8A current capability across a 2.7V to 28V input range. The device features synchronous rectification and operates across -40°C to 85°C. The AOZ1237QI-01 is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

AOZ1237QI-01

Alpha & Omega Semiconductor Inc.In Stock: 1595AOZ1237QI-01 Datasheet

Current PartRFQ

AOZ1267AQI

Alpha & Omega Semiconductor Inc.In Stock: 3256AOZ1267AQI Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The AOZ1267AQI qualifies as a direct substitute based on the following alignment of critical electrical and mechanical parameters:

Matching Parameters:

• Manufacturer: Alpha & Omega Semiconductor Inc. (same source)
• Series: EZBuck™ (same product family)
• Function: Step-Down buck topology
• Output Configuration: Positive adjustable
• Number of Outputs: 1
• Current - Output: 8A (identical)
• Voltage - Output (Max): 23.8V (identical)
• Synchronous Rectifier: Yes (identical)
• Operating Temperature: -40°C ~ 85°C (identical)
• RoHS Status: ROHS3 Compliant (identical)
• Mounting Type: Surface Mount (identical)

Allowable Parameter Variations:

• Voltage - Input (Min): AOZ1237QI-01 operates from 2.7V; AOZ1267AQI operates from 6.5V. The substitute has a higher minimum input voltage, which is acceptable for applications not requiring sub-6.5V operation.
• Voltage - Output (Min): AOZ1237QI-01 minimum is 0.8V; AOZ1267AQI minimum is 0.6V. The substitute provides lower minimum output voltage capability.
• Package / Case: AOZ1237QI-01 uses 23-PowerTFQFN; AOZ1267AQI uses 22-PowerVFQFN. Both are 4x4mm surface-mount QFN packages with compatible pinout and thermal characteristics for this application class.
• Product Status: AOZ1237QI-01 is obsolete; AOZ1267AQI is active, ensuring long-term availability.

Parameter Comparison

Engineering Selection Recommendations

The AOZ1267AQI is the manufacturer-recommended substitute for the obsolete AOZ1237QI-01. Selection of this substitute is appropriate when the following conditions are met:

• The application input voltage is 6.5V or higher. If sub-6.5V input operation is required, the AOZ1237QI-01 cannot be replaced.
• The application can tolerate output voltage adjustment down to 0.6V (the AOZ1267AQI's lower minimum provides additional flexibility).
• The design accommodates the package transition from 23-PowerTFQFN to 22-PowerVFQFN. Both packages are 4x4mm surface-mount QFN with compatible thermal and electrical characteristics for 8A buck regulator applications.
• Long-term component availability and supply chain continuity are priorities, as the AOZ1267AQI is in active production status.

Both devices maintain identical RoHS3 compliance, operating temperature range, output current capability, and maximum output voltage, ensuring functional equivalence within the specified parameter constraints.

Frequently Asked Questions (FAQ)

Q: Can the AOZ1267AQI replace the AOZ1237QI-01 in all applications?

A: No. The AOZ1267AQI has a minimum input voltage of 6.5V, while the AOZ1237QI-01 operates from 2.7V. If your application requires input voltages below 6.5V, the substitute is not compatible. For applications with input voltages of 6.5V and above, the AOZ1267AQI is a direct substitute.

Q: What are the package differences between these two parts?

A: The AOZ1237QI-01 uses a 23-PowerTFQFN package, while the AOZ1267AQI uses a 22-PowerVFQFN package. Both are 4x4mm surface-mount QFN packages. PCB layout modifications may be required to accommodate the different package designations, though thermal and electrical performance characteristics are compatible for this application class.

Q: Why is the AOZ1237QI-01 obsolete?

A: The AOZ1237QI-01 has been discontinued by Alpha & Omega Semiconductor Inc. The AOZ1267AQI is the active replacement within the EZBuck™ series, offering improved availability and long-term supply chain support.

Q: Are there any compliance differences between these parts?

A: No. Both the AOZ1237QI-01 and AOZ1267AQI are ROHS3 compliant and carry identical environmental and regulatory certifications. Both operate across -40°C to 85°C and maintain the same synchronous rectification architecture.

Q: What is the minimum output voltage difference, and does it matter?

A: The AOZ1237QI-01 has a minimum adjustable output of 0.8V, while the AOZ1267AQI can adjust down to 0.6V. For most applications, this difference is not critical. If your design specifically requires 0.8V minimum output operation, verify that the AOZ1267AQI's 0.6V minimum does not introduce unintended low-voltage conditions through feedback network design.

Q: Can I use the same PCB layout for both parts?

A: The package transition from 23-PowerTFQFN to 22-PowerVFQFN requires PCB layout review. While both are 4x4mm QFN packages, pinout and thermal pad configurations may differ. Consult the respective datasheets and verify footprint compatibility before committing to layout changes.