AOZ5318UQI

Overview

The AOZ5318UQI is a DrMOS device from Alpha & Omega Semiconductor Inc., designed for synchronous buck converters in GPU applications. It integrates a half-bridge driver and power MOSFETs in a 31-QFN (5x5) package. The component supports load voltages from 2.5V to 25V with a continuous output current of 65A per channel and peak currents up to 120A. Operating temperatures range from -40°C to 150°C TA, powered by a 4.5V to 5.5V supply.

Feature Summary

• Integrates half-bridge driver and synchronous rectifiers in a compact DrMOS module
• Supports PWM interface for digital control of synchronous buck topologies
• Includes built-in bootstrap circuitry and diode emulation functionality
• Provides comprehensive fault protection including over-temperature, shoot-through, and UVLO

Applications

• Graphics Processing Unit (GPU) power delivery systems
• Synchronous buck converter designs requiring high current density
• High-performance computing voltage regulation modules

Procurement Notes

Verify the specific suffix 'NQI' or 'UQI' against the manufacturer's official datasheet to ensure correct pinout and electrical characteristics. Confirm RoHS compliance status and lead times directly with authorized distributors. Ensure the ordering part number matches the exact package variant required for the PCB footprint.

Selection Notes

Select this component for applications demanding high current capacity within a small thermal profile. The integrated DrMOS design reduces external component count compared to discrete solutions. Verify that the system's thermal management can handle the power dissipation at full 65A load. Ensure the controller provides compatible PWM signals and adequate dead-time settings.

Part Context

This part belongs to the AOZ5318 series of DrMOS devices. Variants such as AOZ5318NQI share similar specifications but may differ in packaging or specific electrical tolerances. The series targets high-efficiency power conversion needs in modern electronic devices where space constraints are critical.

Replacement Considerations

AOZ5318NQI is a related variant within the same product family. Verify if the NQI suffix indicates any functional differences or package variations before substitution. Cross-reference pinouts and thermal pad configurations to ensure mechanical compatibility.