Buck-Boost 2 click is an advanced DC-DC step-down/step-up regulator (buck/boost), which is able to provide regulated 5V on its output, regardless of the input voltage. The input voltage can range from 2.7V up to 40V. The Click board™ provides an ultra-low noise and ripple free regulated output, with transparent switching from buck to boost mode - depending on the input voltage, which produces no discontinuities or switching artifacts, such as transients or subharmonic switching. Selectable switching mode allows optimal power consumption and high power efficiency, for both lighter and heavier loads.