The LNBH25 is a monolithic voltage regulator and interface IC for analog and digital satellite receivers/Sat-TV and Sat-PC cards. It provides the 13/18 V power supply and the 22 kHz tone signaling to the LNB down-converter in the antenna dish or to the multi-switch box. It offers a complete solution with extremely low component count and low power dissipation together with a simple design and I²C standard interfacing.