The audio pre-amplification means for getting output audio with low noise, interference, distortion and also used for controlling the volume, bass and treble. TL072 is mainly used where high-accuracy is needed with respect to low harmonic and noise, as used for audio pre-amplification. POSITIVE VOLTAGE REGULATORS, 78L05 datasheet, 78L05 circuit, 78L05 data sheet: STMICROELECTRONICS, alldatasheet, datasheet, Datasheet search site for Electronic. If this is just a one-off, go ahead and solder on a 7805 in a TO-220 package onto the pads intended for the 78L05. The L version is physically smaller and can dissipate less power and may be rated for less current. Yes, you should be able to substitute a 7805 for the 78L05 if you are willing to do a little kludging mechanically. Current limiting is included to limit the peak output current to a safe value. Safe area protection for the output transistors is provided to limit internal power dissipation.
If internal power dissipation is too high for the heat sinking provided, the thermal shutdown circuit prevents the IC from overheating.
When used as a Zener diode/resistor combination replacement, the 78L05 offers effective output impedance improvement of two orders of magnitude along with lower quiescent current and lower noise. The 78L05 can also be used with power-pass elements to make high-current voltage regulators. The LM78L05 is also a low-current substitute (max 0.1 A) for LM7805. The 78L05 is a three-terminal voltage regulator.
The three terminals are input, output, and ground.
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