Improve buck performance with an optimized high-frequency input capacitor

The high frequency input capacitor is a simple component with noticeable impact to the EMI and control loop performance of a buck regulator. Optimizing both its selection and layout can prevent needing costly PCB revisions from EMI failures or unwanted control loop behaviors later in the development cycle. This video explores the capacitor's impact, how to select it, and how to place it on the PCB.