Wolfspeed, STMicro, and On Semiconductor rally as Nvidia’s Vera Rubin ramp fuels power chip demand

The AI infrastructure buildout just found its next gear, and the companies making the unsexy-but-essential power chips are reaping the rewards. Wolfspeed, STMicroelectronics, and onsemi all surged on Monday as signals from Nvidia’s Vera Rubin platform ramp pointed to a wave of new demand for advanced power semiconductors. Vera Rubin, Nvidia’s successor to the Blackwell architecture, officially entered full production ramp on May 31. The platform pairs Rubin GPUs built on TSMC’s 3nm process with Vera CPUs, targeting AI supercomputers that require power delivery systems far beyond what conventional silicon can efficiently handle. Why power semis are the real story SiC devices handle power conversion more efficiently than traditional silicon, generating less heat and wasting less energy. Nvidia’s Vera Rubin platform incorporates 800VDC power architecture for AI-scale deployments. That specification alone signals a meaningful shift toward higher-power density solutions in data centers, which directly benefits manufacturers of wide-bandgap power electronics. Wolfspeed, STMicroelectronics, and onsemi are three of the most prominent players in this space. Each company produces SiC wafers,...