AOZ1021AI_2

Overview

The AOZ1021AI is a synchronous buck regulator IC from Alpha & Omega Semiconductor, part of the EZBuck series. It operates with an input voltage range of 4.5V to 16V and delivers up to 3A of continuous output current. The output voltage is adjustable down to 0.8V with an initial accuracy of 1.5%. Key electrical parameters include a fixed switching frequency of 500kHz, internal high-side switch resistance of 100mΩ, and low-side switch resistance of 20mΩ. The device achieves efficiencies up to 95% and includes integrated protection features such as thermal shutdown, cycle-by-cycle current limit, and short-circuit protection.

Feature Summary

• Synchronous rectification architecture for high efficiency
• Integrated soft start and pre-bias startup capability
• Comprehensive protection including thermal shutdown and current limiting

Applications

• Point of load DC/DC conversion
• PCIe graphics cards
• Set top boxes
• LCD panels
• Telecom and networking equipment

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm package integrity upon receipt. Check datasheet revisions for any updates to pinout or electrical characteristics before final integration. Ensure storage conditions meet moisture sensitivity level requirements to prevent damage during soldering processes.

Selection Notes

Select this regulator for applications requiring compact size and high efficiency within a 16V input limit. The SO-8 package suits space-constrained designs. Consider the 500kHz fixed frequency for inductor sizing. Evaluate thermal performance under maximum load conditions due to the 100mΩ high-side resistance. Ensure output voltage requirements align with the 0.8V minimum adjustability.

Part Context

The AOZ1021AI belongs to the EZBuck family of synchronous buck regulators designed for simple implementation and high performance. It integrates power switches to minimize external component count. The device is rated for ambient temperatures between -40°C and +85°C. It is manufactured by Alpha & Omega Semiconductor Inc. and utilizes standard surface-mount packaging for automated assembly.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.