[IEEE 2005 8th European Conference on Radiation and Its Effects on Components and Systems - Cap d'Agde, France (2005.09.19-2005.09.23)] 2005 8th European Conference on Radiation and Its Effects on Components and Systems - Influence of Medium Dose Rate X and Gamma Radiation and Bias Conditions on Characteristics of Low-Dropout Voltage Regulators with Lateral and Vertical Serial PNP Transistors