Calculate TL431 feedback divider resistors for adjustable shunt regulator circuits.
This calculator helps choose feedback resistors, timing parts, inductors, capacitors and thermal margins for practical power supply circuits.
Enter your target values and the calculator returns practical component estimates.
Useful for microcontroller boards, bench supplies, LED drivers, battery devices and DC/DC modules.
Always verify with the datasheet, recommended application circuit, PCB layout rules and real measurements.
They are starting estimates. Verify with datasheets and real load tests.
Switching regulators are sensitive to loop area, grounding and capacitor placement.
Check current, thermal limits, feedback reference, inductor saturation and capacitor ESR.