The lm337 calculator is a helpful online tool that can simplify the voltage regulator design process. LM337 is an adjustable three terminal linear negative voltage regulator. With this online tool, you can calculate the two resistor values for the Lm337 IC’s fixed output voltage quickly and accurately.
The LM337 is a 3-terminal adjustable voltage regulator IC which is having variants like LM317-N also some of the alternatives are LM137 and LM237 with almost similar functionality with hardly any difference limited to operating temperate and maximum input voltage.
LM337 CALCULATOR TOOL
To use the above LM337 resistor calculator online tool, you need to type the output voltage to be regulated, and the value of available resistor R1. The calculator tool will then display the required values of the R2 external resistor.
^LM337 designed to operate at Vo and should range from -1.2 to -37V. Default value of resistor R1 here is 1KΩ (you can choose any resistor value). It is recommended to select the resistors with tolerance of 0.5%, 1% or 2% in voltage regulator feedback circuit.
The lm337 calculator tool is an online tool that facilitate users to input the output voltage to be regulated with the help of lm337 and provides the suitable external resistor values according to the formula mentioned in the datasheet. The internal reference voltage of the lm337 is designed at -1.25 volts, with the current supplying capability of -1.5 Amp or more.
The formula for regulated output voltage is:
Vo = – 1.25 x (1 + R2/R1)
R2 and R1 are feedback resistor or shunt resistors. The feedback resistor or shunt resistor are there to provide negative reference voltage (Vref) to the regulator.
Also visit LM317 Calculator tool here
Using the lm337 Resistor Calculator Online Tool
For example, suppose you want to use a lm337 to regulate the output voltage of a power supply to -5V. The internal reference voltage of the lm337 is -1.25V. Using the lm337 calculator tool, you would input -5V to regulated voltage. Choose R1 value, say (1.1kohm). The LM337 regulator calculator tool would then display the required values of the R2 resistors (say 3.3 kilo-ohm).
LM337 has an inbuilt protection, it is having internal current limiting, thermal shutdown, and safe operating area features to prevent blowout.
In addition to preventing errors in calculations, the tool can also prevent component damage and circuit malfunctions. A LM337 regulator calculator can be a valuable tool in your bookmarks as LM337 has a lot of applications not limiting to industrial power supply, factory automation, PLC system, set-top boxes, instrumentation.