AOZ1021AI

Overview

The AOZ1021AI is a synchronous buck regulator from the EZBuck series by Alpha & Omega Semiconductor. It operates with an input voltage range of 4.5V to 16V and delivers up to 3A continuous output current. The output voltage is adjustable down to 0.8V. Key electrical parameters include a fixed switching frequency of 500kHz, internal high-side switch resistance of 100mΩ, and low-side switch resistance of 20mΩ. Initial output accuracy is specified at 1.5%. The device features integrated protections including cycle-by-cycle current limit, thermal shutdown, and short-circuit protection. It is housed in an 8-SOIC package.

Feature Summary

• Synchronous rectification architecture for high efficiency
• Integrated soft start and pre-bias startup capability
• Comprehensive protection against overcurrent, overheating, and short circuits

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 due to the part's discontinued status. Confirm that the received unit matches the specific SO-8 package variant and temperature rating specifications. Ensure compliance with RoHS3 standards as indicated in official documentation. Cross-reference datasheet revisions to validate performance characteristics against design requirements before integration.

Selection Notes

Select this component for applications requiring a compact, single-output synchronous buck solution within the 4.5V to 16V input range. The 3A current capacity and 500kHz frequency balance size and efficiency effectively. Consider the 8-SOIC package constraints for thermal management and PCB layout. Evaluate if the fixed frequency operation aligns with electromagnetic interference requirements compared to variable frequency alternatives.

Part Context

The AOZ1021AI belongs to the EZBuck family of regulators designed for simplicity and high efficiency. It utilizes advanced trench technology to minimize conduction losses. The device integrates power switches to reduce external component count. This series targets cost-sensitive consumer and industrial electronics where space optimization and reliable power delivery are critical design drivers.

Replacement Considerations

AOZ6689CI is listed as a substitute option.