Product Applications

• STB satellite receivers 

• TV satellite receivers 

• PC card satellite receivers 

Product Description

Intended for analog and digital satellite receivers/Sat-TV and Sat-PC cards, the LNBH25S is a monolithic voltage regulator and interface IC, assembled in QFN24L (4x4 mm) specifically designed to provide 13/18 V power supply and 22 kHz tone 

signaling to the LNB down-converter in the antenna dish or to the multi-switch box. In this application field, it offers a complete solution with extremely low component count and low power dissipation together with a simple design and I²C standard

Product Benefits and Features

• Complete interface between LNB and I²C bus 

• Built-in DC-DC converter for single 12 V supply operation and highefficiency (typ. 93 PERCENT @ 0.5 A) 

• Selectable output current limit by external resistor 

• Compliant with main satellite receiver output voltage specifications (15 programmable levels) 

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

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

• 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 protections with I²C diagnostic bits 

• LNB short-circuit dynamic protection 

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

Specifications

Actual product photos

Product Data Book：

For more product information, please download the PDF

Payment&Transportation

Official Certificate&Certificate

Multiple product supply

Company office environment

Warehouse Real Shot

Standard packaging

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