DocumentCode :
646714
Title :
Optimization of power delivery network design for multiple supply voltages
Author :
Siming Pan ; Achkir, Brice
Author_Institution :
Cisco Syst., Inc., San Jose, CA, USA
fYear :
2013
fDate :
5-9 Aug. 2013
Firstpage :
333
Lastpage :
337
Abstract :
Great power demands and low-power techniques have increased the requirements on the power delivery network, especially with multiple supply voltages. In this paper, methods for optimizing decoupling capacitor allocation and placement for multiple power nets are presented. Based on a physics-based circuit model extraction for the PCB-PDN structures, a two-level optimization procedure is proposed. First, stackup and potential locations and patterns for power and ground vias are optimized based on design guidelines. In the second step, distribution and allocation of decoupling capacitors are optimized targeting for the system-level PDN performance among multiple supply voltages by an integer linear programming (ILP) algorithm. The physical properties of the decoupling capacitors are described as circuit elements in the equivalent circuit model. Thus, instead of full-wave analysis, only efficient circuit simulations are needed in the optimization process. The proposed optimization methods are applied in a complex system including integrated circuit with multiple supply voltages. Compared to the original unoptimized design, the optimized PDN impedance for the worst designed power nets improved 400% with the same cost of decoupling.
Keywords :
capacitors; circuit optimisation; equivalent circuits; integer programming; linear programming; low-power electronics; power supply circuits; printed circuits; vias; ILP algorithm; PCB-PDN structures; circuit elements; circuit simulations; complex system; decoupling capacitor allocation; equivalent circuit model; full-wave analysis; ground vias; integer linear programming; integrated circuit; low-power techniques; multiple power nets; multiple supply voltages; optimized PDN impedance; physics-based circuit model extraction; power delivery network design; power demands; power vias; system-level PDN performance; two-level optimization procedure; Capacitors; Impedance; Integrated circuit modeling; Mathematical model; Noise; Optimization; Decoupling Capacitor Optimization; Power Integrity; Simultaneous Switching Noise; Target Impedance;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electromagnetic Compatibility (EMC), 2013 IEEE International Symposium on
Conference_Location :
Denver, CO
ISSN :
2158-110X
Print_ISBN :
978-1-4799-0408-2
Type :
conf
DOI :
10.1109/ISEMC.2013.6670433
Filename :
6670433
Link To Document :
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