AOZ1267AQI

Overview

The AOZ1267AQI is a synchronous step-down DC-DC converter from the EZBuck family, manufactured by Alpha & Omega Semiconductor. It integrates high-side and low-side N-channel power MOSFETs with a fixed-frequency current-mode controller. The device supports an input voltage range of 4.5V to 28V and delivers up to 8A of output current. Key electrical parameters include a switching frequency of 300kHz and a typical quiescent current of 1.2mA. It features adjustable output voltage via an external resistor divider, offering a minimum output of 0.8V. The component operates within a junction temperature range of -40°C to 125°C and is housed in a compact 10-DFN package.

Feature Summary

• Integrates synchronous rectification with internal N-channel MOSFETs for high efficiency
• Utilizes fixed-frequency current-mode control architecture for stable regulation
• Includes comprehensive protection mechanisms against overcurrent, overtemperature, and undervoltage lockout

Applications

• Point-of-load regulation for industrial equipment
• Power distribution systems in telecommunications infrastructure
• Voltage conversion for embedded computing modules

Procurement Notes

Verify the specific suffix 'AQI' matches the required RoHS compliance and lead time specifications. Confirm the package variant aligns with PCB footprint requirements. Cross-reference the manufacturer datasheet revision to ensure compatibility with design-in components. Validate thermal performance expectations against actual board layout conditions before finalizing procurement orders.

Selection Notes

Select this component when a compact solution is needed for converting 24V or 28V rails to lower voltages. The integrated MOSFETs simplify bill of materials compared to discrete designs. Ensure the load current does not exceed the 8A continuous limit. Consider the 300kHz switching frequency for trade-offs between component size and electromagnetic interference. Verify that the output voltage setting resistors are compatible with the internal reference accuracy.

Part Context

This part belongs to the EZBuck series of synchronous buck regulators designed for space-constrained applications. It represents Alpha & Omega Semiconductor's focus on integrating power stages with control logic to reduce system complexity. The DFN packaging facilitates surface-mount assembly in dense electronic assemblies common in modern consumer and industrial electronics.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate alternative synchronous buck converters with similar input ranges and current capabilities only after verifying pin-to-pin compatibility and thermal characteristics.