General Description
The RT5047 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. 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 DiSEqCTM1.x communications. The RT5047 has fault protection (over-current, over-temperature and under-voltage lockout). The RT5047 are available in a SOP-8 (Exposed Pad) package to achieve optimized solution for thermal dissipation.

FEATUREs
Wide Input Supply Voltage Range : 8V to 16V
Output Current Limit of 550mA with 45ms timer
Low Noise LNB Output Voltage (13.3V and 18.3V by SEL Pin)
3% High Accuracy for 0mA to 500mA Current Output
Push-Pull Output Stage minimizes 13.3V to 18.3V and 18.3V to 13.3V Output Transition Time
External 22kHz Tone Input
Meet DiSEqCTM1.x Protocol
Output Short Circuit Protection
Over-temperature Protection

APPLICATIONs
LNB Power Supply and Control for Satellite Set-Top Box
Analog and Digital Satellite Receivers/ Satellite TV,Satellite PC cards