Description
Intended for analog and digital DUAL satellite receivers/Sat-TV, Sat-PC cards, the LNBH26L is a monolithic voltage regulator and interface IC, assembled in QFN24 (4x4) specifically designed to provide the 13 / 18 V power supply and the 22 kHz tone signalling to the LNB down-converter in the antenna dishes or to the multi-switch box. In this application field, it offers a complete solution for dual tuner satellite receivers with an extremely low component count and low power dissipation together with simple design and I²C standard interfacing. QFN24 (4x4 mm)

Features
■ Complete interface between LNB and I²C bus
■ Built-in DC-DC converter for single 12 V supply operation and high efficiency (typ. 93% @ 0.5 A)
■ Selectable output current limit by external resistor
■ Compliant with main satellite receiver output voltage specification (8 programmable levels)
■ Accurate built-in 22 kHz tone generator suits widely accepted standards
■ 22 kHz tone waveform integrity guaranteed also at no load condition
■ Low-drop post regulator and high efficiency step-up PWM with integrated power N-MOS allowing low power losses
■ Overload and overtemperature internal protection with I²C diagnostic bits
■ LNB short-circuit dynamic protection
■ +/- 4 kV ESD tolerant on output power pins

Applications
■ STB satellite receivers
■ TV satellite receivers
■ PC card satellite receivers