OpenVReg16 supporting 16 phase controllers from AOS for AI servers

Alpha and Omega Semiconductor announced its new AOZ73016QI, a 16-Phase, 2-rail controller specifically designed to the latest OpenVReg16 (OVR16) specifications from NVIDIA. AOZ73016QI controller design is based on the company’s high performance, proprietary AOS Advanced Transient Modulator (A2TM) control scheme. In addition to supporting all the basic requirements of the OVR16 specification, the new AOS controller offers value-added features such as RDS(on) and DCR sensing for current monitoring and current balance. These features enable AOS’ controller to support both DrMOS and Smart Power Stages (SPS) to deliver a complete AI server and graphic card power solution along with increased design flexibility. The AOZ73016QI control scheme offers excellent current balance at all load conditions as well as during fast load transients, which is a critical requirement for power-hungry AI and graphics SoCs that demand over several thousands of amperes of peak current. It also capably handles phase doubling or tripling without the addition of a phase doubler so a single controller can support up to a 48-phase design. When paired with AOS’ high performance DrMOS and SPS power stages utilizing AOS’ highly efficient and robust trench MOSFET, the AOS solution offers industry leading efficiency and thermals saving several hundred watts of power during high transient current events that ca...