Pololu 5V, 2.5A Step-Down Voltage Regulator Spannungsregler D24V22F5

This small synchronous switching step-down (or buck) regulator takes an input voltage of up to 36V and efficiently reduces it to 5V. The board measures only 0.7"x0.7" yet delivers a typical continuous output current of up to 2.5A and features reverse voltage protection. Typical efficiencies of 85% to 95% make this regulator well suited for powering moderate loads like sensors or small motors. An optional shutdown pin enables a low-power state with a current draw of around 20µA to 350µA, depending on the input voltage, and a power-good output indicates when the regulator cannot adequately maintain the output voltage.