Description: LM7805 Voltage Regulator
Chinese LM7805 L7805CV L7805 7805 5V 1.5A Voltage Regulator IC 3 Pin TO-220 Package Fixed 5V Positive Voltage Regulator IC
LM7805 is a 5V output positive voltage regulator IC. It is the IC of LM78xx positive voltage regulator series. It is manufactured in TO-220 and other packages. This IC is quite reliable due to which it is widely used in commercial equipment and educational project. Moreover it is also used by many electronics hobbyists and tinkerers in their projects due to its low cost, easy to use and low external components. The IC has many built in features which make it ideal to use in variety of electronic applications like the 1.5A output current, over load protection function, over heat protection, low quiescent current etc.
Voltage regulators are very common in electronic circuits. They provide a constant output voltage for a varied input voltage. In our case the 7805 IC is an iconic regulator IC that finds its application in most of the projects. The name 7805 signifies two meaning, “78” means that it is a positive voltage regulator and “05” means that it provides 5V as output. So our 7805 will provide a +5V output voltage.
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. For example if the input voltage is 12V and you are consuming 1A, then (12-5) * 1 = 7W. This 7 Watts will be dissipated as heat.
- 100% Brand new and high quality!
- L7805CV to provide +5V regulated voltage
- Part Number : L7805CV
- Numbers : LM7805, 7805Part
- Type : Positive Fixed Voltage Regulator
- Output Voltage : +5VMax
- Output Current : 1A
- Max Input Voltage : 35V
- TO-220 Package
- The Output current is 1.5 Ampere
- Instant short circuit shutdown function
- Instant over heat shutdown function
- Low cost
- Reliable to use in commercial devices
- Accurate and fixed 5V output
- Max input voltage is 35V DC
- Low quiescent current only 8mA
7805 as +5V Voltage Regulator
This is a typical application circuit of the 7805 IC. We just need two capacitors of vale 33uf and 0.1uf to get this IC working.
The input capacitor 0.33uF is a ceramic capacitor that deals with input inductance problem and the output capacitor 0.1uF is also a ceramic capacitor that adds to the stability of the circuit. These capacitors should be placed close to the terminals for them to work effectively. Also they should be of ceramic type, since ceramic capacitors are faster than electrolytic.
7805 as adjustable output Regulator
This IC can also act as an adjustable output voltage regulator, meaning you can also control the output voltage for your desired value using the below circuit.
Here, the input voltage can be anywhere between 9V-25V, and the output voltage can be adjusted using the value of resistance R1 and R2. The value can be calculated using the below formulae.
Where, Vxx=5, IQ = 5*10-3
- Voltage step down
- Power Supplies
- Battery Chargers
- Solar Power Supplies
- Microcontroller Related Applications
- Motor Drivers
- Constant +5V output regulator to power microcontrollers and sensors in most of the projects
- Adjustable Output Regulator
- Current Limiter for certain applications
- Regulated Dual Supply
- Output Polarity-Reversal-Protection Circuit
Replacement and Equivalent / Other Part Numbers
LM340, LM340A and LM1084-5.0 can be used as equivalent of LM7805, if these are not available you can also use an LM317 IC to get fixed 5V output.
How to Safely Long Run in a Circuit
For stable and long term performance it is suggested to not operate load more than 1.5A, always use a suitable heatsink with it, always check pinout before using in your application and do not operate in temperature below 0 degree Celsius and above +125 degree Celsius and always store in temperature above -65 degree Celsius and below +150 degree Celsius.
- 1 x Chinese LM7805 L7805CV L7805 7805 5V 1.5A Voltage Regulator IC 3 Pin TO-220 Package Fixed 5V Positive Voltage Regulator IC