iC-Haus GmbH (Bodenheim, Germany) offers a 4- 36 V buck/boost DC/DC converter with two programmable voltages ranging from 1.5V to 5.5V for the compact voltage supply of industrial sensors and small subsystems. It achieves a residual ripple of typically 10 mVpp – suitable for the supply of precision analog circuits. The buck/boost switching converter technology used here makes any distinction between devices supplied with 5V or 10-30V unnecessary, as a steady +5V supply is provided for sensor electronics. The two independently adjustable output voltages Vcc1 and Vcc2 can provide a total of 300 mA and supply digital and analog circuit components separately. The switching converter typically operates at 3 MHz, reducing the size of the external coil to approx. 2 mm × 2 mm and that of the external back-up capacitors to a few microfarads while adhering to the EMC requirement for industrial sensors.