AOZ1038PI_3

Overview

The AOZ1038PI_3 is a synchronous buck regulator from Alpha & Omega Semiconductor, part of the EZBuck family. It operates with an input voltage range of 4.5 V to 18 V and delivers up to 6 A of continuous output current. The device features internal high-side (55 mΩ) and low-side (12 mΩ) switches, achieving efficiencies up to 95%. It includes fixed 450 kHz PWM operation, adjustable output down to 0.8 V, and comprehensive protection mechanisms such as thermal shutdown and short-circuit protection. The component is housed in a thermally enhanced 5x6 DFN-8 package.

Feature Summary

• Integrated synchronous buck architecture with low on-resistance internal switches for high efficiency
• Fixed 450 kHz switching frequency simplifies external component selection
• Built-in protection features including thermal shutdown, cycle-by-cycle current limit, and short-circuit protection

Applications

• Point of load DC/DC converters
• LCD TV power supplies
• Set top boxes
• DVD / Blu-ray players/recorders
• PCIe graphics cards

Procurement Notes

Verify the specific suffix '_3' against official Alpha & Omega Semiconductor documentation to confirm it denotes a standard tape-and-reel packaging configuration or a specific variant within the AOZ1038 series. Ensure the ordering information matches the exact pinout and thermal pad requirements for the 5x6 DFN-8 package to avoid integration errors during procurement.

Selection Notes

Select this component for applications requiring a compact, high-efficiency step-down solution within a 4.5 V to 18 V input range. The fixed 450 kHz frequency and integrated switches reduce external bill of materials. Consider the 6 A current capability and thermal performance of the exposed pad package when designing heat dissipation strategies for dense PCB layouts.

Part Context

The AOZ1038PI_3 belongs to the EZBuck series of synchronous buck regulators by Alpha & Omega Semiconductor. This line emphasizes ease of use and high efficiency for portable and consumer electronics. The PI suffix typically indicates the SO-8 package variant, while other suffixes may denote DFN packages or reel configurations within the same functional family.

Replacement Considerations

Direct replacements include other models within the AOZ1038 family, such as AOZ1038DI-1, which share identical electrical specifications but may differ in package type or reel orientation. Verify pin compatibility and thermal characteristics before substituting.