Abstract: In some embodiments, a voltage regulator assembly comprises a linear regulator coupled to a first input voltage to generate an first output voltage, different from the first voltage, a switching regulator, and a bypass switch coupled to an input of the switching regular and switchable between a first position in which the first output from the linear regulator is applied as a bias input to the switching regulator and a second position in which the output of the switching regulator is applied as a bias input to the switching regulator. Other embodiments may be described.