The LNBH25 is a monolithic voltage regulator and interface IC for analog and digital satellite receivers/Sat-TV and Sat-PC cards. It provides the 13/18 V power supply and the 22 kHz tone signaling to the LNB down-converter in the antenna dish or to the multi-switch box. It offers a complete solution with extremely low component count and low power dissipation together with a simple design and I²C standard interfacing.
The LNBH25 is a monolithic voltage regulator and interface IC designed for analog and digital satellite receivers and PC cards. It integrates a DC-DC step-up converter and an LDO post-regulator to provide 13V or 18V power supplies and a 22kHz DiSEqC tone signal to the Low Noise Block (LNB) down-converter. The device features a complete I2C interface for controlling output voltage, current limits, and tone generation, allowing for a low component count design.
| Supply Voltage Range | 8 V to 16 V |
|---|---|
| Efficiency | typ. 93 % @ 0.5 A |
| Package | QFN24 (4 x 4 mm) |
| ESD Tolerance | +/-4kV |
The device requires a single source voltage between 8 V and 16 V.
Yes, it includes an accurate built-in 22 kHz tone generator suitable for widely accepted standards.