ARG81300 Supply & Control Voltage Regulator Allegro MicroSystems ARG81300 Supply and Control Voltage Regulator is a single-channel low-noise block regulator (LNBR). The ARG81300 has a monolithic boost converter followed by a low-drop linear regulator. The device provides the power and the interface signals to an LNB down converter via coaxial cable in satellite TV receiver systems.