AOZ1021AI_4

Overview

The AOZ1021AI is a synchronous buck regulator from the EZBuck series, manufactured by Alpha & Omega Semiconductor Inc. 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. Key electrical parameters include a fixed switching frequency of 500kHz, 1.5% initial output accuracy, and internal soft start. The device features cycle-by-cycle current limit, pre-bias start-up, short-circuit protection, and thermal shutdown. It is housed in an 8-SOIC package (0.154" width) and rated for operation between -40°C and +85°C ambient temperature.

Feature Summary

• Synchronous rectification with low on-resistance internal switches
• Integrated protection mechanisms including thermal shutdown and current limit
• Fixed 500kHz PWM operation for consistent timing
• Adjustable output voltage starting from 0.8V

Applications

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

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm lot traceability and RoHS compliance status prior to integration. Check for obsolescence notices as this part may be discontinued. Ensure storage conditions meet moisture sensitivity level requirements to prevent package damage during assembly.

Selection Notes

Select this regulator for applications requiring high efficiency and compact size within a 4.5V to 16V input range. Consider the 3A current capability and SO-8 footprint for space-constrained designs. Evaluate thermal performance under maximum load conditions. Verify that the 500kHz switching frequency aligns with electromagnetic interference constraints of the target system.

Part Context

The AOZ1021AI belongs to the EZBuck family of synchronous buck regulators designed for simple implementation and high efficiency. It integrates power switches and control logic into a single chip, reducing external component count. The 8-SOIC package facilitates surface mount assembly. This series targets portable electronics and industrial equipment needing reliable step-down conversion.

Replacement Considerations

AOZ1021DI