This tool is suitable for typical feedback-style DC-DC adjustable boost and buck chips. Currently known compatible components are:
FP6291LR-G1, SY8088AAC, MPQ4430, LM2576-ADJ, LM2596-ADJ, MC33063, MC34063, MP1584, XL4001, SX1308.

If it is not one of the above models, please check the datasheet to determine if it is applicable. Also, note that different chips have different requirements for the range of voltage feedback dividing resistor values. Feedback on the compatibility status of unknown models is welcome.

Instructions:

Enter two out of the three: reference voltage and output voltage, series voltage dividing resistor, and parallel voltage dividing resistor, to calculate the remaining parameter and generate the circuit diagram, calculation formula, and specific calculation steps in real-time.

For example, for SY8088IAAC, to calculate the feedback dividing resistor combination for a 3.3V output:

1. Vref = 0.6, Vout = 3.3, Ra (R_H) and Rb (R_L) range from 100k to 1M. First, try the median value Ra = 470k, resulting in Rb = 104.44k;
2. The current Rb value does not have a suitable standard resistor. Since it is close to the lower limit of the recommended range, the value should be adjusted upwards. Try adjusting Ra to 680k, resulting in Rb = 151.11k;
3. Adjust Rb to the commonly used standard resistor 150k, and finally determine the voltage feedback dividing resistor combination of 680k/150k, with an output voltage of 3.32V.

* The reference voltage Vref (Vfb, FB) and the range of dividing resistor values should be determined by consulting the component datasheet.

Click to view the above calculation demonstration