Intended for analog and digital satellite  receivers/sat-TV, sat-OC cards, the TMI8100 is a  monolithic voltage regulator and interface IC,  packaged in CPC8, specifically designed to provide  the 14V/19V power supply with high efficiency and  the 22kHz TONE signaling to the LNB downconverter in the antenna dish or to the multi-switch  box. TMI8100 consists of a BOOST converter and a  low-noise linear regulator along with the circuitry  required for TONE injection and pin controllable  interface. The device makes the total LNB supply  design simple, efficient and compact with low  external component count  

The external modulation input (TONE pin) can  accept a tome modulated DiSEqC command and  transfer it symmetrically to the output to meet  DiSEqC 1.x protocol.