MP8125

The MP8125 is a voltage regulator designed to provide efficient, low noise power to the Satellite receiver’s RF LNB (Low Noise Block) converter via coaxial cable through a DiSEqC 1.x compatible link that receives instructions from a dedicated controller. The MP8125 integrates a current mode boost regulator followed by a tracking linear regulator. The boost regulator provides a clean and quiet power source that will not contaminate the low noise RF signal down converted to the receiver. The tracking linear regulator protects the output against overload or short. The MP8125 provides a number of features described in the European EUTELSAT specification (DiSEqC) including: voltage selection of horizontal or vertical polarization directions of LNB and a selectable VOUT compensation for voltage drop on the long coaxial cable. In accordance with DiSEqC standard, a tone signal of 22kHz is generated by an internal oscillator and can be activated or deactivated onto output by EXTM pin.