AOZ5311NQI_2

Overview

The AOZ5311NQI_2 is a DrMOS synchronous buck converter from Alpha & Omega Semiconductor Inc., integrating a half-bridge driver and power MOSFETs in a 31-QFN (5x5) package. It supports PWM interface control with a supply voltage range of 4.5V to 5.5V and handles load voltages between 2.5V and 20V. The device delivers an output current of 55A per channel with a peak output capability of 120A. Operating within a temperature range of -40°C to 125°C, it features bootstrap circuits, diode emulation, and status flags for enhanced monitoring.

Feature Summary

• Integrates half-bridge driver and power stage into a single DrMOS module
• Includes built-in fault protection mechanisms such as over-temperature, shoot-through, and UVLO
• Supports diode emulation mode for improved light-load efficiency
• Provides status flag outputs for system monitoring

Applications

• Synchronous buck converters
• GPU core voltage regulation
• Memory subsystem power delivery

Procurement Notes

Verify the specific suffix against official manufacturer documentation to confirm exact electrical characteristics and packaging options. Ensure compatibility with your PCB footprint and thermal design requirements before ordering. Confirm RoHS compliance status if required by your manufacturing standards. Cross-reference datasheet revisions to ensure feature consistency.

Selection Notes

Select this component for applications requiring high current density in a compact form factor. The integrated DrMOS design simplifies layout and reduces component count compared to discrete solutions. Consider the 55A continuous current rating and 120A peak capability when designing for transient loads. Ensure adequate thermal management due to the high power density in the 31-QFN package.

Part Context

This part belongs to the AOZ5311 series of DrMOS devices designed for high-performance power delivery. It is commonly used in graphics processing units and other high-current digital logic applications. The integration of driver and power stages allows for efficient space utilization on dense circuit boards while maintaining robust performance under heavy loads.

Replacement Considerations

Check for AOZ5311NQI-03 as a potential variant within the same family. Verify pinout and electrical specifications match exactly before substitution. Consult official replacement guides for any functional differences between suffixes.