AOZ5311NQI-03

Overview

The AOZ5311NQI-03 is a DrMOS component from Alpha & Omega Semiconductor Inc., designed for high-current GPU applications. It integrates a half-bridge driver and synchronous buck converter in a 31-QFN (5x5) package. The device supports a load voltage range of 2.5V to 20V and delivers an output current of 55A per channel, with a peak output capability of 120A. Operating within a supply voltage of 4.5V to 5.5V, it features PWM interface control. The unit operates across a temperature range of -40°C to 125°C TA and includes protection against over-temperature, shoot-through, and UVLO conditions.

Feature Summary

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

Applications

• Synchronous buck converters
• GPU core power delivery systems
• High-density server power supplies

Procurement Notes

Verify the specific ordering suffix '-03' matches the required tape and reel configuration, as packaging variants such as cut tape or Digi-Reel may exist under different part numbers. Confirm the manufacturer's standard lead time of 18 weeks aligns with project schedules. Ensure the 31-PowerVFQFN package dimensions are compatible with the target PCB footprint and thermal design requirements before finalizing procurement orders.

Selection Notes

Select this component when designing power stages requiring up to 55A continuous output current in a small form factor. The integrated DrMOS architecture reduces bill-of-materials count by combining driver and MOSFETs. Ensure the application supports the specified 4.5V to 5.5V driver supply voltage and utilizes PWM signaling. Verify that the thermal management solution can handle the heat dissipation associated with 120A peak currents in a 5x5mm QFN package.

Part Context

This part belongs to the AOZ5311 series of DrMOS devices optimized for graphics processing units. It represents a consolidated power solution replacing discrete driver and MOSFET arrangements. The product is actively manufactured by Alpha & Omega Semiconductor Inc. and is classified under PMIC half-bridge drivers. It is commonly found in high-performance computing hardware requiring efficient, high-current voltage regulation.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult official cross-reference lists from Alpha & Omega Semiconductor for compatible alternatives.