DC1780A-A

DC1780A-A demonstration circuit features PolyPhase® design using the LTM4620EV, the high efficiency, high density, dual 13A, switch mode step-down power module regulator. The input voltage is from 4.5V to 16V. The output voltage is jumper selectable from 1.0V to 2.5V. DC1780A-A can deliver nominal 50A output current with 2× LTM4620s in parallel. The LTM4620 on DC1780A-A always operates 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-CONTROL pin. The output voltage is tightly regulated between “VOUT+” and “VOUT–” through remote output voltage sensing which improves output voltage regulation at heavy loads. These features and the availability of the LTM4620EV in a compact 15mm × 15mm × 4.41mm LGA package make it ideal for use in many high-density point-of-load regulation applications.

• 50A maximum continuous output current
• 500kHz default operating frequency
• Resistor programmable frequency range from 400kHz to 780kHz
• Two LTM4620 μmodule regulators on the board