The ISL6423B is a highly integrated voltage regulator andinterface IC, specifically designed for supplying power andcontrol signals from advanced satellite set-top box (STB)modules to the low noise blocks (LNBs) of singe antennaports. The device consists of a current-mode boost PWMand a low-noise linear regulator along with the circuitryrequired for 22kHz tone generation, modulation and I2Cdevice interface. The device makes the total LNB supplydesign simple, efficient and compact with low externalcomponent count.
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