The VI Chip Pre-Regulator Module is a very efficient non-isolated regulator capable of both boosting and bucking a wide range input voltage. It is specifically designed to provide a controlled Factorized Bus distribution voltage for powering downstream VI Chip Voltage Transformation Modules -- fast, efficient, isolated, low noise Point-of-Load (POL) converters. In combination, PRMs and VTMsTM form a complete DC-DC converter subsystem offering all of the unique benefits of Vicor's Factorized Power Architecture (FPA): high density and efficiency; low noise operation; architectural flexibility; extremely fast transient response; and elimination of bulk capacitance at the Point-of-Load (POL).