foot structure IC 78XX and 79XX
Now it should no longer need to laboriously search for the op-amps, transistors and other components to realize the regulator op-amp circuit.
regulator with IC LM 78XX and 79XX
Because this kind of circuit has been packaged into a single fixed voltage regulator IC. Are now widely known as the 78XX series component of the voltage regulator remains positive and 79XX series which is a voltage regulator to remain negative. In fact, these components are usually already equipped with current limiting (current limiter) and also limiting the temperature (thermal shutdown). This component is only three pins and by adding some components alone can be a power supply circuit was good regulation.
IC LM78XX
For example 7805 is a voltage regulator to get a 5 volt, 12 volt voltage regulator 7812 and beyond. While such 79XX series is the 7905 and 7912 which are respectively the negative voltage regulator 5 and 12 volts.
IC LM79XX
Apart from the fixed voltage regulators have a voltage regulator IC also can be arranged. The principle is the same as OP-amp regulator packaged in a single IC for regulators such as LM317 LM337 variable positive and negative variables for the regulator. The difference between resistors R1 and R2 are outside the IC, so that the output voltage can be adjusted via external resistors.
regulator with IC LM 78XX and 79XX
It's just important to know that with the IC regulator circuit can work, tengangan input must be greater than the output voltage regulatornya. Usually the difference in voltage Vin to Fout recommended in the datasheet component. Use heatshink (Aluminum cooling) is recommended if these components to be used to supply a large current. In the datasheet, these components can pass through the flow reaches a maximum of 1 A.