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Voltage and current regulator calculator

Voltage regulator

Given the value of both resistors, and the regulator model, this page calculates the output voltage of the regulator.

Depending on the used model, the output voltage should be at least 2 volts higher than the one wanted at the output. If a lower input voltage is required, a low dropout (LDO) regulator should be used, since they can operate without needing a high voltage drop. For higher efficiency or a voltage booster, a switching regulator is suggested.

R1: Ohms

R2: Ohms

Regulator:

Vout:

Voltage regulator schematic

Current regulator

Given the value of the resistor and the regulator model, this page calculates the maximum output current, as well as the power disipated by the resistor in the worst case.

R: Ohms

Regulator:

Iout:

Pr:

Current source schematic

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