Voltage regulators use to get any fixed or variable output voltage. There are many types of voltage regulators comes from different manufactures that can fill your requirement. For the example we have 12VDC SMPS and want to power-up 5v microcontroller, we need to get down voltage. For this we can use LM7805 regulator.
List of different Fixed voltage output regulators :-
Regulator Part
No.
|
Min-Max Voltage Input
|
Output voltage
|
LM7805
|
7-25v
|
5
|
LM7806
|
8-25v
|
6
|
LM7808
|
10.5-25v
|
8
|
LM7809
|
11.5-25v
|
9
|
LM7810
|
12.5-25v
|
10
|
LM7812
|
14.5-25v
|
12
|
LM7815
|
17.5-30
|
15
|
LM7818
|
21-33v
|
18
|
LM7824
|
27-38v
|
24
|
List of variable output voltage regulators with output current :-
Regulator Part No.
|
Min-Max Voltage Input
|
Output voltage
|
Output Current
|
LM317
|
3.7-40v
|
1.2 – 37v
|
1.5A
|
LM138/LM338
|
3-40v
|
1.2 – 32v
|
5A
|
LM350
|
4.2 – 35v
|
1.2 – 33v
|
3A
|
LM723
|
9.5-40v
|
2 – 37v
|
150ma
|
LM337
|
-0.3 to -40v
|
-1.2 to -37v
|
-1.5A
|
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