Abstract – Power architects engaged in designing systems requiring low output noise and fast transient response,such as RF Transmitters, Power Amplifiers, Test Systems,Displays, designs supporting low voltage ASICs and Laser Diode Transmitters, understand that when attempting to tailor power systems to meet both requirements using passive components, the two objectives become diametrically opposed. Minimizing periodic and random deviations (PARD) requires filtering, whereas fast transient response is impeded by filtering.