Description: The LM2698 is used to design a fully isolated forward converter power supply. The output inductor, L1, is augmented by a secondary winding to make a coupled-inductor (transformer) for creating a second low cost linear output. The linear output uses the LP2986 augmented with an additional pass transistor, Q2, to drive up to 1A of current. The LM2698 is a PWM regulator with internal low-side FET switch. The cascode FET stage, M1, provides a low cost means to protect the regulator IC from the high input voltage while providing very fast switching.