A cascoded level shifter is subdivided into a first voltage section and a second voltage section, the first voltage section having a lower voltage supply than the second voltage section, and a combined voltage across the first voltage section and the second voltage section corresponding to the high voltage range. The shifter includes an input node receiving an input signal, a cascoded device disposed in one of the first voltage section and the second voltage section, the cascoded device includes a driver switch connected in series with a cascode switch at a midpoint node, the cascode switch switching in dependence on a reference voltage of a reference node and the input signal, and reference voltage perturbation circuitry configured to cause a transient perturbation to the reference voltage in response to a transition of the input signal to cause the cascode switch to switch.