Switching voltage regulators rapidly switch a series device on and off. Like linear regulators, nearly-complete switching regulators are also available as integrated circuits. Unlike linear regulators, these usually require one external component: an inductor that acts as the energy storage element. Large-valued inductors tend to be physically large relative to almost all other kinds of components, so they are rarely fabricated within integrated circuits and IC regulators. Step down, high efficiency and buck voltage regulators from Rapid.