# How does an adjustable voltage regulator work?

## How does an adjustable voltage regulator work?

An adjustable voltage regulator is a regulator that can be adjusted to output any voltage from the range that the voltage regulator is designed to output. A LM317T voltage regulator, which is what we are going to use in this setup, can be adjusted to output from +1.2V to 37V.

## How do you test A LM317 voltage regulator?

Take the IC out from the circuit and use a breadboard + 2 resistors (or 1 resistor and a potentiometer) and a variable DC power supply, this turn this possible to be tested with the multester. THe LM317T is not like a TO220 package bipolar transistor that can be checked only with an ohmeter.

How does LM317 voltage regulator work?

LM317 Working Principle It is a variable voltage regulator i.e. supports different output voltage levels for a constant applied input voltage supply. A variable resistor is connected at its Adjustment (Adj) terminal in order to control the level of the output voltage according to the requirements of the circuit.

### Can LM317 boost voltage?

Introduction: LM317 Current Boosting Secrets! The output voltage of the regulator can be adjusted from 1.25V to 35V. However, the chip can deliver currents up to 1.5A which is not enough for some power applications.

### What does LM mean in electronics?

The prefix LM stands for linear monolithic, referring to the analog components integrated onto a single piece of silicon. Because of the popularity of these parts, many of them were second-sourced by other manufacturers who kept the sequence number as an aid to identification of compatible parts.

How do you calculate the output voltage of LM317?

Using the formula for the output voltage, VOUT= 1.25V (1 + R2/R1). Being that R1=240Ω, our equation is now 5V= 1.25V (1 + R2/240Ω), so R2=720Ω. So with R2 being a value of 720Ω, the LM317 will output 5V if fed an input voltage greater than 5 volts.

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