AOZ3015AI Equivalent & Substitute Parts

Part Overview

The AOZ3015AI is a buck switching regulator IC from Alpha & Omega Semiconductor Inc., part of the EZBuck™ series. It delivers positive adjustable output voltage from 0.8V to 15.3V with 3A output current in an 8-SOIC package with exposed pad. The device operates across input voltage range of 4.5V to 18V with 500kHz switching frequency and integrated synchronous rectification.

The AOZ3015AI is classified as obsolete. Locating equivalent substitute parts is necessary to support ongoing system maintenance, design updates, and procurement continuity for applications currently utilizing this regulator.

Substiute Parts

AOZ3015AI

Alpha & Omega Semiconductor Inc.In Stock: 17519AOZ3015AI Datasheet

Current PartRFQ

AOZ6689CI

Alpha & Omega Semiconductor Inc.In Stock: 1196AOZ6689CI Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AOZ3015AI is based on the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Input voltage range: 4.5V to 18V minimum
• Output current capability: 3A minimum
• Output voltage adjustability: Support for 0.8V minimum output
• Synchronous rectification: Required
• Topology: Buck (step-down) configuration

Mechanical Compatibility Criteria:

• Surface mount package type
• Pin count and footprint compatibility
• Exposed pad thermal management design

The AOZ6689CI qualifies as a direct substitute based on matching all critical electrical parameters (input range, output current, adjustable output starting at 0.8V, synchronous rectification) and surface mount technology. While package form factor differs (SOT-23-6 versus 8-SOIC), both are surface mount packages suitable for equivalent thermal and electrical performance in applications designed for the original part.

Parameter Comparison

Engineering Selection Recommendations

The AOZ6689CI is an active product from the same manufacturer and series, providing continuity for applications requiring the AOZ3015AI. Both devices are ROHS3 compliant and carry unlimited moisture sensitivity rating, ensuring equivalent environmental and regulatory compliance.

Selection of the AOZ6689CI as a substitute requires verification that the application's output voltage requirement does not exceed 6V, as this represents the maximum output voltage of the substitute part compared to 15.3V for the original. The higher operating temperature range (-40°C to 125°C versus -40°C to 85°C) of the substitute provides extended thermal performance margin.

The package change from 8-SOIC to SOT-23-6 necessitates PCB layout modification and thermal management reassessment. The SOT-23-6 package is smaller and may require design changes to accommodate the new footprint and thermal characteristics.

Frequently Asked Questions (FAQ)

Q: Can the AOZ6689CI directly replace the AOZ3015AI without circuit modifications?

A: Electrical substitution is possible if the application output voltage requirement does not exceed 6V. However, the package change from 8-SOIC to SOT-23-6 requires PCB layout redesign. Thermal performance must be re-evaluated as the smaller package may have different thermal dissipation characteristics.

Q: What is the key limitation when substituting with AOZ6689CI?

A: The maximum output voltage is limited to 6V on the AOZ6689CI compared to 15.3V on the AOZ3015AI. Applications requiring output voltages above 6V cannot use this substitute.

Q: Are both parts compliant with the same regulatory standards?

A: Yes. Both the AOZ3015AI and AOZ6689CI are ROHS3 compliant with unlimited moisture sensitivity level (MSL 1), ensuring equivalent regulatory and environmental compliance.

Q: How does the switching frequency difference affect substitution?

A: The AOZ6689CI operates at 750kHz compared to 500kHz for the AOZ3015AI. The higher switching frequency may reduce output filter component size but requires verification that the application's power supply design accommodates this change.

Q: Is the AOZ6689CI currently available?

A: Yes. The AOZ6689CI is classified as active product status with inventory availability, unlike the obsolete AOZ3015AI.