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A 123-phase DC-DC converter-ring with fast-DVS for microprocessors
Yan Lu1,2; Junmin Jiang1; Wing-Hung Ki1; C. Patrick Yue1; Sai-Weng Sin2; Seng-Pan U2,3; R. P. Martins2,4
Conference Name62nd IEEE International Solid-State Circuits Conference (ISSCC)
Source Publication2015 IEEE International Solid-State Circuits Conference - (ISSCC) Digest of Technical Papers
Conference Date22-26 Feb. 2015
Conference PlaceSan Francisco, CA, United states
Author of SourceInstitute of Electrical and Electronics Engineers Inc.
Other Abstract

Inspired by The Square of Vatican City, a fully integrated step-down switched-capacitor DC-DC converter ring with 100+ phases is designed with a fast dynamic voltage scaling (DVS) feature for the microprocessor in portable or wearable devices. As shown in Fig. 20.4.1, this symmetrical ring-shaped converter surrounds its load in the square and supplies the on-chip power grid, such that a good quality power supply can be easily accessed at any point of the chip edges. There are 30 phases on the top edge and 31 phases on each of the other 3 edges, making 123 phases in total. The phase number and unit cell dimensions of this architecture can easily be adjusted to fit the floor plan of the load. The pads of the converter-ring are placed at the corners, and will not affect the pads of the load. Moreover, by using the proposed VDD-controlled oscillator (VDDCO), the frequency of which is controlled by varying its supply voltage, a hitherto unexplored feature of the multiphase DC-DC architecture is exposed: the control-loop unity gain frequency (UGF) could be designed to be higher than the switching frequency. 

Indexed BySCI
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000355252700153
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Cited Times [WOS]:4   [WOS Record]     [Related Records in WOS]
Document TypeConference paper
Affiliation1.Hong Kong University of Science and Technology, Hong Kong, Hong Kong;
2.University of Macau, Macao, China;
3.Synopsys, Macao, China;
4.Instituto Superior Tecnico, Universidade de Lisboa, Portugal
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Yan Lu,Junmin Jiang,Wing-Hung Ki,et al. A 123-phase DC-DC converter-ring with fast-DVS for microprocessors[C]//Institute of Electrical and Electronics Engineers Inc.,2015:364-365.
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