• Complete Integration Solution for LNB and I2C
• DiSEqC 1.x Compatible
• Supports 9-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 Specifications
• 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 WQFN 3.00-mm × 3.00-mm (RTE) Package

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

Designed for analog and digital satellite receivers, the TPS65233-1 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.

TPS65233-1 features high power efficiency. The boost converter integrates a 120-mΩ power MOSFET running at 1-MHz switching frequency. Drop out voltage at the linear regulator is 0.8 V to minimize power loss. TPS65233-1 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 WQFN 3.00-mm × 3.00-mm (RTE) package.