The input voltage of my system is ±15V. I need to generate the ±5V voltage. As I need it to power precise analog components (ADC, op amps), my plan is to use DC/DC converter for reducing it to, lets say ±7V, and than to use linear regulator (like LT3032) to get the required ±5V (as linear regulators in general have lower noise). As total current of my system is about 1A, I would avoid solution with only linear regulators because of substantial dissipation. However, I am not sure how to implement DC/DC conversion for negative rail. I know that there are options for supply inversion (make negative rail from positive), but it seems (maybe I am wrong) that those inversion rails circuits are usually for currents less than 1A. And those circuits only use positive rail, although I have also the negative one coming to the system. I saw somewhere schematic with two (non-isolated) DC/DC converters, connected like in the following figure, but I am not sure if this is possible (at least work for higher currents)? Please suggest what would be the proper solution.
Thank you in advance.