# TPS543x feedback resistor calculator

Texas Instruments TPS5430, TPS5431

Select the ideal feedback resistors for your DC converter circuit. This tool helps you adjust the output voltage of a TPS543x DC/DC converter. Experiment with combinations of up to three resistors, enhancing precision in voltage regulation.

## Datasheet note:

8.2.1.2.4 Output Voltage Set-Point The output voltage of the TPS5430 is set by a resistor divider ( R

_{1}and R_{2}) from the output to the VSENSE pin. Calculate the R_{2}resistor value for the output voltage of 5 V using Equation 12:R

_{2}= ( R_{1}x 1.221 ) / ( V_{out}- 1.221 )For any TPS5430 design, start with an R

_{1}value of 10 kΩ. R_{2}is then 3.24 kΩ.

DC/DC Converter: | TPS543x |

Texas Instruments TPS5430, TPS5431 | |

Step-down 3A Adjustable | |

Input Range: | 5.50V - 36.00V |

Output Range: | 1.22V - 31.32V |

Manufacturer Part # | TPS5430DDAR |

Manufacturer | Texas Instruments |

Formula V_{out} = | R1 * 1.221 / R2 + 1.221 |

Recommended R1 | 10000 |