LT3470, Low Ripple Micro-power SOT-23 Buck Regulator with Integrated Boost and Catch Diodes accepts Inputs to 40V

Circuit shows LT3470 uses a minimum of board space and external components while delivering wide input range and high efficiency. This buck regulator supplies up to 200mA at 5V from inputs up to 40V. Input power loss is below 1mW when there is no output load