AOZ1038PI

Overview

The AOZ1038PI is a high-efficiency, easy-to-use synchronous buck regulator from the EZBuck series by Alpha & Omega Semiconductor. It operates within an input voltage range of 4.5 V to 18 V and delivers up to 6 A of continuous output current. The output voltage is adjustable down to 0.8 V. Key electrical parameters include internal high-side and low-side switches with resistances of 55 mΩ and 12 mΩ respectively. The device features a fixed PWM switching frequency of 450 kHz. It includes protection mechanisms such as cycle-by-cycle current limit, short-circuit protection, and thermal shutdown. The component is rated for ambient temperatures between -40 °C and +85 °C and is housed in a thermally enhanced exposed pad SO-8 package.

Feature Summary

• Synchronous buck topology with integrated high-side and low-side power switches
• Fixed 450 kHz PWM operation for consistent timing control
• Comprehensive protection suite including thermal shutdown and short-circuit protection
• Internal soft start and pre-bias startup capability

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 'PI' against the manufacturer's official datasheet to confirm the package type and temperature rating. Confirm RoHS compliance status and REACH registration details directly with the supplier or manufacturer documentation before procurement. Ensure the ordering information matches the exact part number variant required for your design specifications.

Selection Notes

Select this component when a compact synchronous buck solution is needed for inputs up to 18 V. The 6 A output current capacity suits moderate power applications. Consider the fixed 450 kHz frequency for filter size optimization. Verify that the exposed pad SO-8 package meets the PCB layout thermal requirements. Compare against similar EZBuck family members if different current ratings are required.

Part Context

The AOZ1038PI belongs to the EZBuck family of synchronous buck regulators designed for simplicity and efficiency. This series targets point-of-load conversion needs in consumer electronics and computing hardware. The PI suffix typically denotes the specific package configuration and commercial temperature grade within the broader AOZ1038 product line.

Replacement Considerations

Check for direct pin-compatible alternatives within the same EZBuck family, such as the AOZ1037 or AOZ1039, depending on current requirements. Verify that any substitute maintains the 450 kHz switching frequency and compatible output voltage range.