On-Package Decoupling Strategy to Mitigate Radio Frequency Interference from Integrated Voltage Regulators

This paper presents a new solution for mitigating integrated voltage regulator (IVR) switching noise by using on-package radio frequency (RF) decoupling capacitors. IVR enables product miniaturization but prone to RFI issues without proper design considerations due to high switching frequency. The proposed decoupling strategy allows flexible and low-cost platform designs. The critical design parameters, such as capacitance, capacitor number, and locations, are studied. The effectiveness of the proposed solution is validated with system-level measurements. These recommendations may help to mitigate radio frequency interference (RFI) due to IVR switching noise, relax IVR routing requirements, and eliminate the need of on-board shielding.