The datasheet specifications should be met, without exception, to ensure that the system design is reliable over its power supply, temperature, and output/input. The LM78XX series of three terminal regulators is available with several fixed output voltages making them useful in a wide range of applications One of these is. C Datasheet PDF Download – 3 Terminal Positive Voltage Regulator, C data sheet.
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Why c Voltage regulator drops the current if the current enters around 13mA to 7mA? TL — Programmable Reference Voltage.
That is the current that flows from the input out of the GND pin the input current is the sum of the output current and the GND current. Home Questions Tags Users Unanswered.
Email Required, but never datasgeet. Sign up using Email and Password. The maximum GND current is 8. Have a look at a typical datasheet and see the data related to the “quiescent current”. I understand your voltage divider is to limit U1 Vin to 25 volts. But, the IC suffers from heavy heat loss hence a Heat sink is recommended for projects that consume more current.
Voltage regulators are very common in electronic circuits. This 7 Watts will be dissipated as heat.
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. Sign up or log in Sign up using Google. These capacitors should be placed close to the terminals datasheef them to work effectively. The input capacitor 0. This will help the LM maintain a stable output voltage even with changes in load.
Complete Technical Details can be found at the datasheet give at the end of this page. Also they should be of ceramic type, since ceramic capacitors are faster than electrolytic. LM Voltage Regulator Datasheet.
The value of R17 is not shown because it is different for different regulator datashedt voltages eg. Post as a guest Name. I know there should be voltage and current drop from the voltage regulator but my question is why current drops off? The is a voltage regulator providing a 5V output, it needs some current to operate.
This is a typical application circuit of the IC. To help even more replace R1 with 2 each 12 volt 5W zener diodes in series to lock the voltage at 24 VDC at pin 1 of U1.
Sparky 11k 2 15 Here, the input voltage can be anywhere between 9VV, and the output voltage can be adjusted using the value of resistance R1 and R2.