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The RT5047BF is a highly integrated voltage regulator and interface IC, specifically design for supplying power and control signals from advanced satellite set-top box (STB) modules to the LNB down-converter in the antenna dish or to the multi-switch box. </p>The device is consists of the independent current-mode boost controller and low dropout linear regulator along with the circuitry required for 22kHz tone shaping to support DiSEqC<sup>TM</sup>1.x communications. </p>The RT5047BF has protection (over-current, over-temperature and under-voltage lockout). </p>The RT5047BF is available in a SOP-8 (Exposed Pad) package to achieve optimized solution for thermal dissipation.</p>
RT5047BF Typical Circuit
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<div class="spec-list"><ul class="lv1"><li>Wide Input Supply Voltage Range : 8V to 16V </li><li>Output Current Limit of 550mA with 6ms timer </li><li>Low Noise LNB Output Voltage (13.3V and 18.3V by SEL Pin) </li><li>±3% High Accuracy for 0mA to 500mA Current Output </li><li>Push-Pull Output Stage Minimizes Output Transition Time </li><li>External 22kHz Tone Input </li><li>Meet DiSEqC<sup>TM</sup>1.x Protocol </li><li>Output Short Circuit Protection </li><li>Over-Temperature Protection </li></ul></div>
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RT5047BF Ordering Information
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<div class="spec-list"><ul class="lv1"><li>LNB Power Supply and Control for Satellite Set-Top Box </li><li>Analog and Digital Satellite Receivers/Satellite TV, Satellite PC cards </li></ul></div>
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