![]() In many cases where an Op-Amp is working in dual mode power supply a negative voltage will be regulated by these 79XX ICs. Negative voltage regulators are mainly used in Op-Amp and other circuits where a negative supply voltage is needed. Why do we need Negative Voltage Regulators? For example if the input voltage is 12V and you are consuming 1A, then (12-5) * 1 = 7W. The output current of this IC can go up to 1.5A, but the IC suffers from heavy heat loss hence a Heat sink is recommended for projects that consume more current. So our 7905 will provide a -5V output voltage. The name 7905 signifies two meaning, “79” means that it is a negative voltage regulator and “05” means that it provides 5V as output. In our case the 7905 IC is an negative 5V regulator, meaning it provides -5V as output. They provide a constant output voltage for a varied input voltage. Voltage regulators are very common in electronic circuits. ![]() Note: Complete Technical Details can be found at the LM7905 voltage regulator datasheet given at the end of this page. Junction Temperature maximum 125 degree Celsius. ![]() Internal Thermal Overload and Short circuit current limiting protection is available.
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