Designed for analog and digital satellite receivers, the TPS65235-1 is a monolithic
voltage regulator with I2C interface; specifically to provide the 13-V
to 18-V power supply and the 22-kHz tone signal to the LNB down converter in the antenna dish or to
the multi-switch box. It offers a complete solution with minimum component count, low power
dissipation together with simple design and I2C standard
TPS65235-1 features high power efficiency. The boost converter integrates a 140-mΩ power
MOSFET running at 1 MHz or 500 kHz selectable switching frequency. Drop out voltage at the linear
regulator is 0.8 V to minimize power loss. TPS65235-1 provides multiple ways to generate the 22 kHz
signal. Integrated linear regulator with push-pull output stage generates 22-kHz tone signal
superimposed at the output even at zero loading. Current limit of linear regulator can be
programmed by external resistor with ±10% accuracy. Full range of diagnostic read by
I2C is available for system monitoring.
TPS65235-1 has a special design at FCCM mode to avoid the audible noise especially when
VIN is higher or closer to the VLNB output.
TPS65235-1 supports advanced DiSEqC 2.x standard with 22-kHz tone detection circuit and
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