Demonstration Circuit 2164A-B features a PolyPhase design using three LTM4630EY-1's (A-grade), the high efficiency, high density, dual 18A, switch mode step-down power module regulator. The input voltage is from 4.5V to 15V. The output voltage is jumper selectable and can be set to 0.9V, 1.0V, 1.2V, 1.5V or 1.8V. DC2164A-B can deliver nominal 105A output current. As explained in the data sheet, output current derating is necessary for certain VIN, VOUT, and thermal conditions. The LTM4630-1A on DC2164A-B always operate in continuous conduction mode. The switching frequency can be programmed through a resistor or can be synchronized to an external clock signal. The board allows the user to program how its output voltage ramps up and down through the TRACK pin.