A 4-phase PWM controller from AOS, paired with industry-standard DrMOS power stages, boosts system efficiency for NVIDIA Blackwell GPU platforms. The AOZ73004CQI, which powers AI servers and graphics cards based on the Blackwell architecture, is fully compliant with the Open Voltage Regulator (OpenVReg) OVR4-22 standard.
The AOZ73004CQI’s cycle-by-cycle current limit aligns with the GPU’s overcurrent protection requirements, enabling safe power throttling to maximize performance. It features an external reference input and PWMVID interface for dynamic output voltage control. By reducing ripple effects, the controller achieves PWMVID slew rates of up to 30 mV/µs—a threefold increase over typical rates. Additionally, deep-off and shallow-off power states minimize power consumption.
The AOZ73004CQI with 4-phase PWM is not limited to using four DrMOS power stages as standard. AOS’s proprietary DrMOS design allows precise turn-on timing, enabling one PWM to drive two or three DrMOS devices. By doubling or tripling DrMOS, designers can create a high-power, multiphase system with up to 12 power stages.
Prices for the AOZ73004CQI buck controller start at $1.20 each in lots of 1000 units.
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