AOZ1043PI Equivalent & Substitute Parts

Part Overview

The AOZ1043PI is a Buck Switching Regulator IC manufactured by Alpha & Omega Semiconductor Inc., designed for step-down voltage conversion in surface mount applications. The device is packaged in 8-SOIC (0.154", 3.90mm Width) with exposed pad and belongs to the EZBuck™ series. The product status is obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

AOZ1043PI

Alpha & Omega Semiconductor Inc.In Stock: 59193AOZ1043PI Datasheet

Current PartRFQ

AOZ6623DI

Alpha & Omega Semiconductor Inc.In Stock: 8841AOZ6623DI Datasheet

MFR RecommendedRFQ

AOZ6643DI

Alpha & Omega Semiconductor Inc.In Stock: 869AOZ6643DI Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AOZ1043PI are identified based on the following criteria derived from the provided parameters:

• Manufacturer: Same manufacturer (Alpha & Omega Semiconductor Inc.) ensures design continuity and support
• Series: EZBuck™ series maintains functional compatibility
• Function & Topology: Step-down buck converter topology
• Mounting Type: Surface mount configuration
• Package Category: Similar form factor and pin count (8-pin packages with exposed pad)
• Compliance: ROHS3 compliant and REACH unaffected status
• Product Status: Active status ensures ongoing availability

The substitute parts AOZ6623DI and AOZ6643DI meet these criteria while offering enhanced specifications including adjustable output voltage, higher output current capability, and active product status.

Parameter Comparison

Engineering Selection Recommendations

Both AOZ6623DI and AOZ6643DI are active products from Alpha & Omega Semiconductor Inc. within the EZBuck™ series, providing direct functional substitution for the obsolete AOZ1043PI. Both substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity.

The primary distinction between the two substitutes is the switching frequency: AOZ6623DI operates at 550kHz while AOZ6643DI operates at 500kHz. This difference may affect PCB layout considerations and electromagnetic interference characteristics in the application circuit.

Package transition from 8-SOIC to 8-DFN requires PCB layout modification. The 8-DFN-EP (3x3) package offers improved thermal performance through the exposed pad design, beneficial for applications requiring enhanced heat dissipation.

Frequently Asked Questions (FAQ)

Q: Why is the AOZ1043PI being replaced? A: The AOZ1043PI has reached obsolete product status. The recommended substitutes AOZ6623DI and AOZ6643DI are active products offering equivalent buck converter functionality with enhanced specifications and continued manufacturer support.

Q: Are the substitute parts pin-compatible with the AOZ1043PI? A: Both substitute parts use 8-pin packages with exposed pads. However, the package type differs: AOZ1043PI uses 8-SOIC while substitutes use 8-DFN-EP (3x3). Pin assignment must be verified against respective datasheets before PCB redesign.

Q: What is the difference between AOZ6623DI and AOZ6643DI? A: The primary difference is switching frequency: AOZ6623DI operates at 550kHz and AOZ6643DI at 500kHz. All other electrical specifications, including input voltage range (4.5V to 18V), output current (3A), and adjustable output voltage range (0.8V to 15.3V), are identical.

Q: Do the substitute parts require circuit design changes? A: The substitute parts maintain the same buck converter topology and output specifications. Circuit design changes are primarily related to package transition from 8-SOIC to 8-DFN-EP, which may affect PCB layout, thermal management, and component placement.

Q: Are compliance certifications maintained with the substitute parts? A: Yes. Both AOZ6623DI and AOZ6643DI maintain ROHS3 compliance and REACH unaffected status, matching the regulatory profile of the original AOZ1043PI.

Q: Which substitute part should be selected? A: Selection between AOZ6623DI and AOZ6643DI depends on application-specific requirements regarding switching frequency. The 50kHz difference may influence EMI performance and component selection for the output filter network.