The increasing diffusion of portable electronics, biomedical implants and Internet of Things (IoT) devices has intensified the need for integrated circuits capable of operating under stringent energy constraints. In such systems, not only the active power but also the standby power consumption has become a critical factor, as devices often spend the majority of their lifetime in idle or sleep states. Hence, it is crucial to reduce leakage and standby current in order to extend battery lifetime. Today, power consumption is a fundamental constraint that has left a significant footprint in both circuit and system design. A widely adopted solution consists of turning off the Bandgap Generator (BG) of the system by means of a Sample-and- Hold (S/H).