A flying cap, level shifter has a capacitor with an upper plate connected to (i) a hybrid power supply (VDDH-VDDL) by an n-type transistor and (ii) a relatively high-voltage power supply VDDH by a p-type transistor. Both of the transistors are controlled by a voltage at the level shifter's output node, which is driven to either VDDH or ground. As such, one of the two transistors will always be on, such that the flying capacitor will be continuously recharged to a voltage difference that ensures that the level shifter will operate properly.