ISL6423
ISL6423 is Single Output LNB Supply and Control Voltage Regulator manufactured by Renesas.
NOT REMENDED FOR NEW DESIGNS POSSIBLE SUBSTITUTE PRODUCT ISL6423B
Single Output LNB Supply and Control Voltage Regulator with I2C Interface for Advanced Satellite Set-Top Box Designs Di SEq C 2.0 patible
FN9191 Rev 2.00 Dec 5, 2008
The ISL6423 is a highly integrated voltage regulator and interface IC, specifically designed for supplying power and control signals from advanced satellite set-top box (STB) modules to the low noise blocks (LNBs) of single antenna ports. The device consists of a current-mode boost PWM and a low-noise linear regulator along with the circuitry required for 22k Hz tone generation, modulation and I2C device interface. The device makes the total LNB supply design simple, efficient and pact with low external ponent count.
The current mode boost converter provides the linear regulator with input voltage that is set to the final output voltages, plus typically 0.8V to insure minimum power dissipation across the linear regulator....
