I would love some help with my overvoltage situation. The problem is that at the input of the circuit, the voltage can vary from between 20 to 80 volts and the output requires two voltages, 1 that powers a motor at 15 to 30 volts with a max current of 700mA and another that powers a second circuit at 5 volts. The motor voltage can have slight variations but the 5Vs needs to be pretty much 5 volts flat. The problem is to provide a possible solution that would result in the greatest efficiency. I know that if I was to try to use voltage regulators a lot of energy will be lost/dissipated meaning an inefficient circuit. Do you have any suggestions into how I could get those two volts from the worst case 80 Volts without having to dissipate most of the energy as heat?