L·di/dt noise
Beginner
A dip in the push of electricity caused by the chip’s need for electricity changing very fast.
Novice
A voltage dip caused by inductance, the property of any current path that resists a change in current. The dip equals the inductance times how fast the current changes (), so a sudden jump in demand through the package’s wiring makes the supply sag.
Expert
Dominates dynamic droop near the chip–package resonance. Reduced by on-chip decap, lower-inductance packages and more power bumps, and by limiting how fast large blocks wake up or ramp up activity.