The Distinguished Lecture on “Chiplet-LEGO: Delivering Multiple Voltage Rails to Chiplets with Chiplet VRMs” will take place as follows:
Date: 08 September 2025 (Monday)
Time: 17:00 – 18:00
Venue: Research Building N21, G/F, G013
The speaker is:
Dr. ZENG Wenliang, UM Macau Fellow of SKL-AMSV and IME, University of Macau
The Lecture is:
Chiplet-LEGO: Delivering Multiple Voltage Rails to Chiplets with Chiplet VRMs
Abstract:
Chiplet-LEGO is a single-input multiple-output (SIMO) linear extendable group operated (LEGO) voltage regulator module (VRM) architecture as a new development of the LEGO-VRM family. This architecture not only offers a high voltage conversion ratio but also delivers multiple output voltages, making it well-suited for VRMs in system-on-chip (SoC) applications with multiple voltage rails. The Chiplet-LEGO scales well to numerous numbers of independently regulated output voltages to meet specific application requirements. Modularity architectures complicate stability and control, requiring a deep understanding of dynamics. This seminar introduces the Chiplet-LEGO dynamic model step by step. Intermediate-voltage-bus analysis guides front-end frequency selection (1SC+1Buck), cross-regulation informs buck design to reduce interaction (1SC+2Buck), and interphase LC resonance shapes device selection for reliability (2SC+2Buck). Finally, a comprehensive dynamic model of dual-output Chiplet-LEGO (2SC+4Buck) is obtained.
Biography:
Dr. ZENG Wenliang received the Ph.D. degree in electrical and computer engineering from the University of Macau (UM), Macau, China, in 2020. He is currently an UM Macau Fellow with the Institute of Microelectronics and the State Key Laboratory of Analog and Mixed-Signal VLSI, UM. From September 2023 to August 2025, he was a Visiting Post-Doctoral Research Associate with the Power Electronics Research Laboratory, Department of Electrical and Computer Engineering, Princeton University, Princeton, NJ, USA. His research interests include fully integrated, ultralow quiescent current integrated and large conversion ratio high-power DC–DC converters, power architecture, and power magnetics. Dr. ZENG was a recipient of Macau Science and Technology R&D Award for Postgraduates (Master Level) in 2016. He was also a recipient of the Young Researcher Award 2020 of International Institute of Macau in Applied Science.
