Renesas Electronics Corporation Special Purpose Regulators ISL9492ERZ

The ISL9492ERZ is a highly integrated voltage regulator designed for satellite set-top box applications, specifically for supplying power and control signals to low noise blocks (LNB) from a single antenna port. It features an I2C interface for easy control, allowing for the adjustment of output voltages and modulation of DiSEqC commands. The device integrates a boost power MOSFET, current-mode boost PWM, and a low-noise linear regulator, resulting in a compact design with a low external component count. This regulator supports selectable output voltages of 13.5V or 18.5V and includes built-in protections such as overvoltage, undervoltage, overcurrent, and over-temperature, all of which can be monitored through the I2C interface. The ISL9492ERZ is suitable for applications requiring efficient power management with a switching frequency of 490kHz and high efficiency exceeding 92%. It operates within a temperature range of -20¬8C to +85¬8C and comes in a 28-lead TQFN package.