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 (15

programmable levels)

• Accurate built-in 22 kHz tone generator suits widely accepted standards

• 22 kHz tone waveform integrity guaranteed at no-load condition as well

• Low drop post regulator and high efficiency step-up PWM with integrated power

NMOS allowing low power losses

• LPM function (low power mode) to reduce dissipation

• Overload and overtemperature internal protection with I²C diagnostic bits

• LNB short-circuit dynamic protection

• +/- 4 kV ESD tolerant on output power pins

Description

Intended for analog and digital dual satellite receivers/Sat-TV, and Sat-PC cards, the

LNBH26S is a monolithic voltage regulator and interface IC, assembled in QFN24 4 x

4 specifically designed to provide the 13/18 V power supply and the 22 kHz tone

signaling 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 extremely low component count, low power dissipation together with simple

design and I²C standard interfacing.

Applications

• STB satellite receivers

• TV satellite receivers

• PC card satellite receivers