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What is the output voltage range of IC LM317?
1.25 V to 37 V
The LM317 device is an adjustable three-terminal positive-voltage regulator capable of supplying more than 1.5 A over an output-voltage range of 1.25 V to 37 V. It requires only two external resistors to set the output voltage.
What is the minimum input voltage of LM317?
Table 7.3 in the datasheet you point to gives the actual value on the second line, calling it “Input-to-output differential voltage”, giving it a minimum value of 3.0V. That is to say, you should always give an LM317 at least 3V more than you’ve set for its output voltage.
How do you determine the voltage across a resistor?
Ohm’s law states that the electromagnetic force, or voltage, at any point in a circuit can be determined by multiplying the current by the resistance. Thus, voltage (V) = current (I) x resistance (R). When resistors are combined in series, one after another, this formula can be used to determine the voltage over any given resistor in the series.
What is the voltage of a resistor?
The voltage drop across resistors in parallel is always the same. For the parallel circuit, the voltage at one end of each of the resistors is 10 volts and the voltage at the other end of the resistor is at 0 volts.
What is voltage regulator and how does it work?
A voltage regulator is basically a beefed up emitter follower, like described above – a transistor connected to a stable reference that spits out a constant voltage, dropping the rest. They also have a built in error amplifier, which samples the output voltage (again through a divider), compares it with the reference voltage, calculates the difference, and drives the output transistor accordingly.
What is a voltage regulator circuit?
A Voltage Regulator is an integrated circuit that outputs a specified DC voltage. An example of this is a 5-volt regulator, such as the LM7805, which provides a consistent voltage of 5 volts. Voltage regulators are necessary in applications where a certain constant and consistent level of DC voltage is needed in a circuit.