What is the use of 7805?

7805 Voltage Regulator Circuit This 7805 circuit is capable of upholding fixed output voltage even if some changes take place in input voltage. When the distance between the power supply filter and the regulator is high, then the 0.33uF capacitor is needed to place it near the input.

How does a linear voltage regulator work?

A linear regulator employs an active (BJT or MOSFET) pass device (series or shunt) controlled by a high gain differential amplifier. It compares the output voltage with a precise reference voltage and adjusts the pass device to maintain a constant output voltage.

What does a voltage regulator do?

Voltage regulator, any electrical or electronic device that maintains the voltage of a power source within acceptable limits. The voltage regulator is needed to keep voltages within the prescribed range that can be tolerated by the electrical equipment using that voltage.

How do I convert 7805 to 12v to 5V?


  1. Let’s have a look at the pin configuration of 7805 IC.
  2. Connect the 7805 IC in the Veroboard.
  3. Now connect 470uf and one 0.1uf capacitor parallelly with pin 1,2.
  4. Now similarly connect 220uf, 0.1uf capacitor parallay with pin 2,3 as connected in the diagram below.

What are the disadvantages of linear voltage regulator?

Disadvantages of linear regulators

  • Simple.
  • Cheap.
  • Power supply rejection ratio. Linear regulators respond quickly to changes in input voltage, producing an output voltage that is mostly free of any ripple on the input.
  • Respond quickly to changes in load voltage.
  • No switching noise.

How do you convert 12v to 5v?

12v to 5v converter using a voltage divider: You can run two LEDs in series across the resistor R2 while taking input from 12V lead-acid battery or a 12v adaptor as an input. Components required: One 12v battery, 1.8k resistor, 1.3k resistor, connecting wires. This circuit is a voltage divider schematic.

What are the functions of a 7805ct voltage regulator?

7805CT voltage regulator is monolithic integrated circuits designed as fixed−voltage regulators for a wide variety of applications including local, on−card regulation. These regulators employ internal current limiting, thermal shutdown, and safe−area compensation.

Who is the manufacturer of the 7805 IC?

Currently, the 7805 Voltage Regulator IC is manufactured by Texas Instruments, ON Semiconductor, STMicroelectronics, Diodes incorporated, Infineon Technologies, etc. They are available in several IC Packages like TO-220, SOT-223, TO-263 and TO-3.

What kind of voltage does a 7805 transformer use?

Here are the 7805 datasheet of popular 5V voltage regulator IC and the 7805 pinouts. They are designed to provide a constant 5V. When powered by from about 7.3 to 35 volts. We usually want to use a stable voltage source. Which it is a lower voltage than batteries. Sometimes, the transformer power supply may have a high voltage.

Are there any other versions of the 7805?

7805 Pinout Be careful! Other 7805 versions: The 7805 has various versions. The TO-3 version comes in an all-metal can for better heat sinking. A small plastic TO-92 version provides up to 100 mA for low power circuits. In the present, we will often see DPARK, since It is a small size suitable for SMD PCB work.