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LNB Voltage Regulator with I2C Interface Power Management IC (PMIC)


Package | PIN: RTE | 16
Temp: I (-40 to 85)
Carrier: Cut Tape
Qty Price
1-9 $2.12
10-24 $1.91
25-99 $1.78
100-249 $1.56
250-499 $1.46
500-749 $1.24
750-999 $1.05
1000+ $1.00


  • Complete Integration Solution for LNB and I2C
  • DiSEqC 1.x Compatible
  • Supports 5-V and 12-V Power Bus
  • Up to 1000-mA Accurate Output Current Limit
    Adjustable by External Resistor and I2C
  • Boost Converter With Low
    Rdson Internal Power Switch
  • Dedicated Enable Pin for
    Non-I2C Application
  • Low Noise, Low Drop Output With
    Push-Pull Output Stage
  • Built-In Accurate 22-kHz Tone Generator
    or External Pin
  • Adjustable Soft-Start and 13-V/18-V Voltage
    Transition Time
  • Compliant with main satellite receiver systems
  • LNB Short Circuit Dynamic Pprotection
  • Diagnostics for Output Voltage Level,
    Input Supply UVLO, and DiSEqC Tone Output
  • Cable Disconnect Diagnostic
  • Available in a 16-Pin QFN 3-mm × 3-mm (RTE) Package

Texas Instruments  TPS65233RTER

Designed for analog and digital satellite receivers, the TPS65233 is a monolithic voltage regulator with I2C interface, specifically to provide the 13-V/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 very low component count, low power dissipation together with simple design and I2C standard interfacing.

TPS65233 features high power efficiency. The boost converter integrates a 120-mΩ power MOSFET running at 500-kHz switching frequency. Drop out voltage at the linear regulator is 0.8 V to minimize power loss. TPS65233 provides multiple ways to generate the 22-kHz signal. Integrated linear regulator with push-pull output stage generates clean 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.

The part is available in a 16-pin QFN 3-mm × 3-mm (RTE) package.