AOZ5273QI

Overview

The AOZ5273QI is a high-performance Smart Power Stage (SPS) from Alpha & Omega Semiconductor, designed for synchronous buck converter applications. It integrates two asymmetrical MOSFETs within a single package to optimize efficiency and power density. The device operates with an input voltage range of 3V to 20V. Key electrical specifications include a 30V High-Side MOSFET rating and a maximum continuous current capability of 70A. The component utilizes a 39-pin QFN (5x6mm) package, facilitating compact PCB layouts for high-current power delivery systems in server and AI infrastructure.

Feature Summary

• Integrates asymmetrical MOSFETs for optimized switching performance
• Supports wide input voltage range from 3V to 20V
• Designed for high-current synchronous buck conversion
• Compact QFN package for space-constrained designs

Applications

• Server power supplies
• Artificial Intelligence (AI) accelerator modules
• 5G base station power distribution
• High-performance GPU power stages

Procurement Notes

Verify the specific suffix variant if available, as the base part number may have associated derivatives. Confirm the obsolete status with the manufacturer or authorized distributors before finalizing design-in decisions. Ensure the 39-QFN footprint matches the target PCB layout. Cross-reference the marking code AH00 for physical identification during incoming inspection.

Selection Notes

Select this component when designing synchronous buck converters requiring high current density and integrated gate drive capabilities. The asymmetrical MOSFET configuration offers improved efficiency compared to symmetrical alternatives. Consider the 3V-20V input range compatibility with standard system rails. Evaluate the thermal performance requirements given the 70A current rating in the specified package size.

Part Context

The AOZ5273QI belongs to the AOZ527xQI series of Smart Power Stages developed by Alpha & Omega Semiconductor. This series targets high-efficiency multiphase controller agnostic solutions for demanding computing environments. The product line emphasizes integration of power switches and drivers to reduce component count and improve transient response in modern data center and communication equipment power architectures.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. As the AOZ5273QI is listed as obsolete, alternative sourcing requires direct consultation with the manufacturer for lifecycle management options or equivalent functional replacements based on specific pinout and electrical parameter matching.