We are designing a circuit board that may be exposed to significant levels of ionizing radiation in a nuclear physics research experiment. The crucial components of the board are all rad hard. A test portion of this circuit will be operational only when the board is not exposed to radiation. (The main use of the test circuitry is during board commissioning, and this is done with no radiation exposure.) The LT3045 linear regulator is a nice fit to power this test circuitry. Can we reduce radiation damage and thus increase the lifetime of the LT3045 if we remove input power from it while it is exposed to radiation?