An All-Digital,VMAX-Compliant,and Stable Distributed Charge Injection Scheme for Fast Mitigation of Voltage Droop

Suyoung Bang, Minki Cho, Pascal Meinerzhagen, Andres Malavasi, Muhammad Khellah, James Tschanz, Vivek De

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Distributed charge injection (CI) scheme featuring distributed VMAX-complaint CI clamps,distributed digital droop detectors (DDDs),and distributed droop controllers for fast mitigation of voltage droop is fabricated in 10-nm FinFET CMOS test-chip. A local DDD detects nearby voltage droop in two clock cycles of IP block,and quickly triggers associated CI clamps to inject charge from a high voltage rail (e.g.,1.8 V) to VCC for immediate voltage droop mitigation. Local droop controller collectively guarantees stable operation after CI is triggered,by gradually allowing the voltage regulator to take over after the droop subsides. Measured data shows droop reduction by up to 45% for a uniform transient load current transition,and by 38% in a hot-spot load current transition at 1.0 V and 2.0 GHz. The droop reduction is translated to power savings of ∼11% over a guard-banded baseline.

Original languageEnglish
Title of host publicationESSCIRC 2019 - IEEE 45th European Solid State Circuits Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages143-146
Number of pages4
ISBN (Electronic)9781728115504
DOIs
StatePublished - Sep 2019
Externally publishedYes
Event45th IEEE European Solid State Circuits Conference, ESSCIRC 2019 - Cracow, Poland
Duration: 23 Sep 201926 Sep 2019

Publication series

NameESSCIRC 2019 - IEEE 45th European Solid State Circuits Conference

Conference

Conference45th IEEE European Solid State Circuits Conference, ESSCIRC 2019
Country/TerritoryPoland
CityCracow
Period23/09/1926/09/19

Bibliographical note

Publisher Copyright:
© 2019 IEEE.

Keywords

  • Distributed charge injection (CI)
  • fast voltage droop mitigation
  • hot-spot load current transition
  • local digital droop detector (DDD)

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