Mini-LEGO: A 1.5-MHz 240-A 48-V-to-1-V CPU VRM with 8.4-mm Height for Vertical Power Delivery

Youssef Elasser, Jaeil Baek, Kaladhar Radhakrishnan, Houle Gan, Jonathan Douglas, Vivek De, Shuai Jiang, Harish K. Krishnamurthy, Xin Li, Charles R. Sullivan, Minjie Chen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Scopus citations

Abstract

This paper presents the design and optimization of a miniaturized 48-V-to-l-V 240-A linear-extendable group oper- ated point-of-load (LEGO-PoL) CPU voltage regulation module (VRM) - Mini-LEGO - with 336 mm2 area and 8.4 mm height for vertical power delivery. The Mini-LEGO features compact device implementation, simplified gate drive circuitry, optimized magnetics, and switches at 1.5 MHz. The overall converter area, including all power stage and gate drive circuitry, is 336 mm 2 with 0.71 A/mm2 current area density. The vertical coupled inductor delivers 80 A with a thickness of 2.5 mm. It achieves a peak efficiency of 87.1 %, a full load efficiency of 84.1 %, and a power density of 1,390 W/in3 with the maximum device junction temperature maintained below 100°C after five minutes of full- load operation.

Original languageEnglish (US)
Title of host publicationAPEC 2023 - 38th Annual IEEE Applied Power Electronics Conference and Exposition
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1959-1966
Number of pages8
ISBN (Electronic)9781665475396
DOIs
StatePublished - 2023
Event38th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2023 - Orlando, United States
Duration: Mar 19 2023Mar 23 2023

Publication series

NameConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
Volume2023-March

Conference

Conference38th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2023
Country/TerritoryUnited States
CityOrlando
Period3/19/233/23/23

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Keywords

  • coupled inductor
  • dc-dc power conversion
  • point-of-Ioad
  • switched-capacitor
  • vertical power delivery
  • voltage regulator module (VRM)

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