A reference voltage that is consistent over various operational conditions and uses low power is provided. According to an example, an internal temperature-compensated voltage (e.g., vdd_int in 200) is generated from a power supply (e.g., vdd in 200), and a reference voltage (e.g., vref in 200) is generated from the internal voltage. The reference voltage is stored on a storage circuit (e.g., 430) that is coupled (charged) and refreshed under conditions, relative to circuit characteristics, that make low and ultra-low power operation possible.