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IVORY: Early Stage Design Space Exploration Tool for Integrated Voltage Regulators

An Zou, Tao Tong, Jingwen Leng, Yazhou Zu, Vijay Janapa Reddi, David Brooks, Gu-Yeon Wei, Xuan Zhang

In Proc. of Design Automation Conference (DAC), Jun. 2017

Despite burgeoning adoptions to improve power delivery efficiency, integrated voltage regulators (IVRs) have yet to be evaluated in a rigorous, systematic, nor quantitative manner. To fulfill this need, we present Ivory, a high-level design space exploration tool capable of providing accurate conversion efficiency, static performance characteristics, and dy- namic transient responses of an IVR-enabled power delivery subsystem (PDS), enabling rapid trade-off exploration at early design stage 1000x faster than SPICE simulation. We demonstrate and validate Ivory with a wide spectrum of IVR topologies. In addition, we present a case study using Ivory to reveal the optimal PDS configurations with underlying power break-downs and area overheads for the GPU manycore architecture, which is yet to embrace IVRs.