What is a 78L05?
The 78L05 is a 5V fixed 3-terminal voltage regulator delivering up to 100mA of output current and equipped with internal limiting + thermal shutdown features for overload immunity. The 78L05 can also be used with power-pass elements to make high-current voltage regulators.
What is variable regulator?
An adjustable voltage regulator produces a DC output voltage, which can be adjusted to any other value of certain voltage range. Hence, adjustable voltage regulator is also called as a variable voltage regulator. The DC output voltage value of an adjustable voltage regulator can be either positive or negative.
What do linear regulators do?
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.
How do you use 78L05?
The 78L05 is fairly easy to use, you only have to connect the input pin to the input voltage that has to be regulated and the ground pin to the system ground. The regulated 5V can be obtained from the output pin. In the circuit below an input voltage of 12V is regulated to 5V using the 78L05.
Where are linear regulators used?
・When a steady power supply is required The use of a linear regulator at the front-end of components that need a steady voltage or are susceptible to noise will enable constant and safe operation at a steady voltage.
Which regulator is most efficient?
5. Which type of regulator is considered more efficient? Explanation: The switching element dissipates negligible power in either on or off state. Therefore, the switching regulator is more efficient than the linear regulators.
Which type of voltage regulator is most efficient?
When high efficiency is needed, or a wide range of input voltage is expected, a switching regulator becomes the best option. Switching voltage regulators have power efficiencies of 85% or better compared to linear voltage regulator efficiencies that are often below 50%.