TI 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 downconverter 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.

• Complete Integration Solution for LNB and 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 Rds(on) 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 Protection
• Diagnostics for Output Voltage Level, Input Supply UVLO, and DiSEqC Tone Output
• Cable Disconnect Diagnostic
• Available in a 16-Pin QFN 3-mm x 3-mm (RTE) Package

• Set Top Box Satellite Receiver
• TV Satellite Receiver
• PC Card Satellite Receiver