Journal
IEEE JOURNAL ON EMERGING AND SELECTED TOPICS IN CIRCUITS AND SYSTEMS
Volume 4, Issue 2, Pages 169-179Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JETCAS.2014.2315880
Keywords
DC-DC converter; hardware security; on-chip voltage regulation; side-channel attack; switched capacitor
Categories
Funding
- National Science Foundation CAREER Grant [CCF-1350451]
- Direct For Computer & Info Scie & Enginr
- Division of Computing and Communication Foundations [1350451] Funding Source: National Science Foundation
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Dynamic power management techniques and related voltage converter architectures are proposed to design a secure and efficient on-chip power delivery system. A new power management technique, converter-gating, that adaptively turns on and off individual stages of an interleaved switched-capacitor voltage converter based on the workload information to improve the voltage conversion efficiency is proposed. Converter-gating technique is further utilized as a countermeasure against side channel power analysis attacks by pseudo-randomly controlling the converter activity. A new method is proposed to improve the response time of the converter during transient load changes by adaptively configuring the conversion ratio of a switched capacitor voltage converter. The proposed converter is designed and verified using IBM 130 nm technology kit. The proposed system achieves 5% higher power conversion efficiency compared to conventional converters, improves the response time to transient load changes from 1.4 mu s to 104 ns and reduces the correlation between the input current and load current.
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