RT5047BFGSP

Overview

The RT5047BFGSP is a single-output LNB supply and control voltage regulator manufactured by Richtek. It integrates a current-mode boost controller, an LDO linear regulator, and 22KHz tone shaping circuitry for DiSEqC 1.x communications. The device operates with a minimum input voltage of 8V and provides an adjustable output voltage range from 13.3V to 19.3V. It supports an output current of 500mA with a switching frequency of 700kHz. The static current is 16mA. It functions within a temperature range of -40°C to +85°C and is housed in an SOP-EP-8 package.

Feature Summary

• Integrates independent current-mode boost controller and low dropout linear regulator
• Includes circuitry for 22KHz tone shaping to support DiSEqC 1.x communications
• Provides fault protection including over-current, over-temperature, and under-voltage lockout

Applications

• Powering LNB down-converters in satellite antenna dishes
• Supplying power to multi-switch boxes in satellite systems
• Providing power and control signals for advanced satellite set-top box modules

Procurement Notes

Verify the specific suffix BFGSP against the manufacturer's official datasheet to confirm pinout and thermal pad configuration. Ensure the SOP-EP-8 package compatibility with your PCB footprint. Check moisture sensitivity levels and reflow soldering profiles prior to assembly. Confirm that the 700kHz switching frequency aligns with your EMI requirements. Validate input voltage ranges match your system design.

Selection Notes

Select this component when designing satellite receiver power stages requiring integrated LNB control. The combination of boost and LDO regulators simplifies bill of materials. Consider the exposed pad package for thermal management in compact designs. Verify DiSEqC compliance if communication features are required. Evaluate the 500mA output capability against load demands.

Part Context

The RT5047 series belongs to Richtek's portfolio of specialized power management ICs for satellite applications. These devices are designed to replace discrete solutions by integrating multiple functions into a single chip. The family focuses on providing stable power and control signals for LNB interfaces. This integration reduces board space and improves reliability in set-top box environments.

Replacement Considerations

RT5047BGSP is listed as an alias or variant. Verify electrical parameters and package dimensions before substitution.