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Capacitor Insertion Methodology to Power Distribution Network for Improving Power Integrity

Shigeaki Hahsimoto (Application Engineer, Murata Manufacturing Co., Ltd.)

Satoshi Komatsu (Professor, Tokyo Denki University)

Toru Nakura (Professor, Fukuoka University)

Location: Ballroom C

Date: Thursday, January 31

Time: 10:00am - 10:45am

Track: 11. Power Integrity in Power Distribution Networks

Session Type: Technical Session

Vault Recording: TBD

Audience Level: All

Voltagemitigation techniques are becoming more and more important
in order to improve stability and to realize high speed operation
circuits. Stability of power supply is usually realized by lowering PDN impedance
using decoupling capacitors. However, the relationship among number/kinds of
decoupling capacitors, PDN impedance and power supply voltage droop
distribution inside of an LSI chip is not yet clear. This paper evaluates the relationship in terms of its
frequency characteristics as well as its time-domain waveforms. Not only with
electro-magnetic frequency domain analysis and transient
simulations, we designed and fabricated a prototype LSI chip assembled on an
evaluation board to measure actual PDN characteristics and power supply
voltage droop of the LSI chip.


Learn how to design PDN impedance especially the number, position and kind of capacitors in order to improve power integrity.

Intended Audience

knowledge of power distribution network design to reduce voltage fluctuation.

Presentation Files