In modern power converter the goal is not only to get high efficiency, achievable by using the GaN technology, but also the possibility of reconfigurability of the control stage. To this aim digital control loop has started to be used which among the many advantages in terms of integrability, speed and compatibility with GaN achievable performance, can also integrate self-adjustment and testing circuitry being also reconfigurable based on the application. This boosts the efficiency of the overall converter, reducing cost and size also considering the possibility to integrate a complete power system, with control logic, signal processing stage and power stage on a single System-On-Chip SoC thanks to the BCD process used by STMicrolectronics.