LM317 Calculator, Voltage Regulator and Constant Current Calculator

LM317 Calculator is used to calculate voltage regulation and Constant Current Regulation. There are several LM317 Calculator available on the web but very few of them are actually user friendly. This LM317 calculator is really simple and user friendly. You can calculate Output Voltage, Output Current Limit and the values of two voltage divider resistances using this online tool.

Ohm
Ohm
Volts

 

 

1 comment on “LM317 Calculator, Voltage Regulator and Constant Current Calculator

  1. Arpan Das

    R1 = 240 ohm
    R2 = 10k ohm
    Vout = 6.458333333333334 Volts

    I think its incorrect.

    Vout=1.25(1 + R1/R2) + Iadj * R2 where we can omit Iadj * R2 porrtion as Iadj is very low in amount.

    Using this formula we get 1.28 volt.

    R1 = 240 ohm
    R2 = 33 ohm
    Vout = 1.265625 Volts

    Using this formula, this time we get 10.34 volt.

    Please correct me if I’m wrong.

    Reply

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