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How much power does a voltage regulator use?
the voltage regulator you are talking about can provide up to 500mA @ 5V. this regulator will always provide 5V. how much current is drawn from it depends what you are connecting to it. the maximum load of the regulator is 500mA but it is perfectly acceptable to draw less from it.
Is voltage regulator same as resistor?
Both the linear regulator and resistor generate about the same power loss equal to the load current times the difference in supply and load voltages. The resistor needs a very slightly lower power but the regulator well regulates the load voltage. As stated a switching regulator would be the most efficient.
What is the current rating of voltage regulator IC LM338 K?
Here is the LM338 Adjustable DC power supply circuit, 1.2V to 30V. It can provide a current maximum to 5A and 10A.
Is the lm338 a 5A or 10A regulator?
LM338 Datasheet. The LM138/LM238/LM338 are adjustable 3-terminal positive voltage regulators capable of supplying in excess of 5A over a 1.2V to 32V output range.
How many resistors do you need for a lm338 power supply?
They are exceptionally easy to use and require only 2 resistors to set the output voltage. The careful circuit design has resulted in outstanding load and line regulation comparable to many commercial power supplies.
What does D1, D2 1n4002 do for lm338?
We use D1, D2 1N4002 to absorbs this current spike to protects the regulator circuits. The discharge current depends on 3 factors. The rate of decrease of VIN. In the LM138. this discharge path is through a large junction. It can tolerate a 25A surge with no problem.
Is there a capacitance limit on the lm138?
The Discharge occurs when either the input or output is shorted. Internal to the LM138 is a 50X resistor. which limits the peak discharge current. No protection is needed for output voltages of 25V or less and 10 mF capacitance.