Navitas Semiconductor introduced a DC-DC power delivery board (PDB) that performs direct conversion from 800 V to 6 V in a single power stage using its GaNFast gallium nitride (GaN) technology. The board eliminates the conventional 48 V intermediate bus converter (IBC) stage inside compute server trays. This removal reduces conversion losses, increases end-to-end system efficiency, improves reliability, lowers cost, and increases compute density by making additional PCB area available for GPUs, memory, and other components.
Current enterprise and cloud data center designs relying on legacy 54 V in-rack power distribution face limitations in supporting the megawatt-scale rack densities required by future accelerated computing platforms. The transition to 800 VDC infrastructure, led by NVIDIA, addresses these constraints.
Navitas previously introduced an 800 V to 50 V DC-DC platform. That design still required a subsequent stage to reach Voltage Regulator Modules (VRMs) operating at 12 V or lower. The new 800 V to 6 V architecture eliminates the 50 V IBC stage entirely and halves the VRM conversion ratio compared with existing PDBs, further improving system performance.
The PDB achieves a peak efficiency of up to 96.5% at full load with a switching frequency of 1 MHz, resulting in a power density of 2,100 W/in³. Its profile is approximately 20% thinner than a mobile phone, enabling close physical integration with GPU boards to optimize transient response and power distribution efficiency.
The primary side consists of 16 × 650 V GaNFast FETs in the DFN8×8 dual-cooled package arranged in a stacked full-bridge configuration. Center-tapped outputs use 25 V silicon MOSFETs. The 1 MHz switching frequency allows the use of minimal passives and planar magnetics to achieve the reported power density.
Chris Allexandre, President and CEO of Navitas Semiconductor, stated that eliminating one conversion stage reduces system cost and power losses while releasing board space for additional compute, memory, and GPU resources to support maximum AI workload performance.
The 800 V–6 V DC-DC PDB will be displayed at NVIDIA GTC 2026, taking place March 16–19 in San Jose, California. It will also be exhibited at Navitas booth #2027 during APEC, March 22–26 in San Antonio, Texas.
