Why Do We Put Capacitors Close to IC Power Pins?

A small capacitor next to an IC may look insignificant, but it plays a critical role in keeping the power supply stable. When a chip switches states, it can suddenly demand current within a very short time. The power source and traces cannot always respond immediately, so the decoupling capacitor acts as a local energy source to reduce voltage fluctuations. This is why good PCB design is not only about connecting components correctly, but also about understanding how current behaves in real circuits.

#PCBDesign #Electronics #HardwareEngineering