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Where to use 78L Voltage regulators are very common in electronic circuits. They provide a constant output voltage for a varied input voltage. In our case the 78L05 IC is an iconic regulator IC that finds its application in most of the projects. The output current of this IC can go up to mA. But, the IC suffers from heavy heat loss hence a Heat sink is recommended for projects that consume more current.
This 0. Another popular voltage regulator is which is bulkier in size but has high current rating of about 1A. So, if you are looking for a smaller package of voltage regulator that has small current rating in TO package then this IC might be the right choice.
How to use 78L The 78L05 is a three terminal voltage regulator. The three terminals are Input, Output and ground as shown in the 78L05 pinout diagram. It is very easy and straight forward to use this IC, just connect the input in to the input voltage which has to be regulated and the ground pin to system ground. The regulated 5V can be obtained from the output pin if the IC. In the circuit below a input voltage of 12V is regulated to 5V using the 78L Because the maximum current that this IC could supply is only upto mA.
Also note the Capacitors C1 and C2 are used at both the Input and output end. These regulators also have the ability to limit current and protect when the temperature exceeds beyond junction temperature. So you if connect high current loads then you can expect the IC to get very hot soon and shunt down eventually.
In that using a high current regulator like would be an ideal choice. Apart from using it as a voltage regulator it can also be used as a current regulator, short-circuit protector, booster circuit and even a variable voltage regulator.
79L05 SMD PDF