Techniques For Implementing A Positive And Negative Output Voltage For Industrial And Medical Equipment

Many analog circuits in industrial and medical applications require both positive and negative supply voltages to operate. If a negative supply voltage is not available on the circuit board, a small and efficient solution takes some power management expertise to develop, especially when the output power is more than a few watts. A discrete switching regulator is often used to derive both a positive and negative output voltage, but implementing an inverting buck-boost topology with a coupled inductor can be burdensome.