STM expands 800 VDC power conversion portfolio
STMicroelectronics has expanded its 800 VDC power conversion portfolio with two new architectures: 800 VDC to 12V and 800 VDC to 6V.
Developed according to the NVIDIA 800 VDC reference design, these new power conversion stages complement the previously introduced 800 VDC to 50V solution.
“As AI infrastructure compute scale continues to expand fast, it requires higher voltage distribution and greater density, which can only be achieved with system-level innovation for each of the different AI server form factors,” said STMicroelectronics' Marco Cassis. “With these new converters for 800 VDC power distribution, ST brings a complete set of solutions to support the deployment of gigawatt-scale compute infrastructure with more efficient, scalable, and sustainable power architectures.”
The expansion to 12V and 6V output stages reflects the industry move toward different server architectures requiring different power delivery topologies depending on GPU generation, server height, form factor, and thermal envelope for large-scale training clusters, inference farms, and high-density AI infrastructures. The 50V, 12V, and 6V intermediate DC buses will all coexist in AI data centres depending on rack density, GPU configuration, and cooling strategy.
The new 800 VDC to 12V converter enables high-efficiency distribution from rack-level power shelves directly to the voltage domains that feed advanced AI accelerators.
The new 800 VDC to 6V path allows OEMs to reduce the number of conversion stages and move the 6V bus closer to the GPU. This reduces copper usage, minimizes resistive losses, and improves transient performance, a critical differentiator for large-scale training clusters.
Back in October 2025, STMicroelectronics introduced a fully integrated prototype power‑delivery system showcasing a compact GaN‑based LLC converter operating directly from 800 V at 1 MHz with over 98 percent efficiency and exceptional power density in a smartphone‑sized footprint exceeding 2,600 W/in³ at 50 V.
The solutions combine ST technologies across power semiconductors (silicon, SiC, GaN), analogu and mixed-signal, and microcontrollers.
