The Distinguished Lecture on “2.5D/3D Vertical Power Delivery for Chiplet Systems” will take place as follows:
Date: 08 August 2025 (Friday)
Time: 11:00 am – 12:00 pm
Venue: Research Building N21, G013
The speaker is:
Prof. LU Yan, Professor, Department of Electronic Engineering, Tsinghua University, Beijing, China
The Lecture is:
2.5D/3D Vertical Power Delivery for Chiplet Systems
Abstract:
With the surging demands for extremely high current at sub-1V supply voltage level in high performance computing and AI training centers, conventional planar power delivery architecture on the XPU cards suffers from high I2R loss in the “last-millimeter” power delivery. With 48V replacing 12V bus, efficient high-density power conversion becomes one of the main bottlenecks for system integration. There is a wide voltage gap between the power bus and the digital rails at the point-of-load (PoL), calling for novel power conversion topologies and system architectures. To bridge this gap, switched-capacitor-inductor (SCI) hybrid DC-DC converter has been one of the hottest topics in the power management IC area. Meanwhile, recent advanced 2.5D/3D packaging technologies enable more design flexibility and topology innovations for the PoL vertical power delivery, especially in chiplet systems. In this talk, we will analyze the difficulties and introduce a few hybrid SCI DC-DC design examples from our research group. Then, we will share several of our observations and design suggestions for future works.
Biography:
Prof. LU Yan received the Ph.D. degree in electronic and computer engineering from The Hong Kong University of Science and Technology (HKUST), Hong Kong, China, in 2013. From 2014 to 2024, he was with the State Key Laboratory of Analog and Mixed-Signal VLSI, University of Macau, Macau, China. On July 1st, 2024, He joined the Department of Electronic Engineering, Tsinghua University, Beijing, China, as a Full Professor with the endowed Xing-Hua Chair Professorship. He has authored/coauthored 200+ peer-reviewed technical articles, including 60+ ISSCC&JSSC papers and three books. His research interests include high-density power converters, integrated voltage regulators, wireless power transfer and energy-harvesting circuits and systems. Prof. LU has served as an ITPC Member for ISSCC, as the Power Management Subcommittee Chair for CICC, an IEEE SSCS Distinguished Lecturer (2022–2023) and an IEEE CAS Society Distinguished Lecturer (2025–2026). He has served as a Guest Editor for IEEE JSSC, TCAS-I, and TCAS-II. He is an Associate Editor for the Journal of Semiconductors and the IEEE Journal of the Electron Devices Society. He was a recipient/corecipient of the IEEE Solid-State Circuits Society Pre-Doctoral Achievement Award (2013–2014), the IEEE CAS Society Outstanding Young Author Award in 2017, and the ISSCC 2017 Takuo Sugano Award for Outstanding Far-East Paper.
