L78L12ACD13TR

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L78L12ACD13TR application field and working principle

As a mainstay of the voltage regulator family, the L78L12ACD13TR is a classic linear regulator from STMicroelectronics. This three-pin regulator offers a guaranteed output current of up to 0.1 A, and includes short-circuit protection and thermal shutdown for added protection. It is ideal for low-noise, low-power designs that call for a stable voltage supply.

The L78L12ACD13TR regulator is used in a wide range of applications, from computers to microcontrollers, peripherals, and telecommunications. It can also be found in medical equipment, automotive systems, and even audio amplifiers. The regulator’s lowest dropout voltage ensures good performance and low power consumption, while its low heat dissipation gives it a reach thermal stability. Additionally, it offers good noise immunity, making it a great choice for noise-sensitive applications.

Working Principle of the L78L12ACD13TR

The L78L12ACD13TR is an adjustable voltage regulator. It produces a fixed output voltage at a current much greater than the input current by using a shunt regulator topology. The regulator uses an internal voltage-divider network to set the output voltage. It senses the output voltage and compares it to a precise reference voltage. As long as the output voltage is greater than the reference voltage, the output transistor is turned off, the output voltage is regulated, and no current flows through the internal feedback network. Conversely, when the output voltage is lower than the reference voltage, the output transistor is turned on, supplying current to the load.

The output voltage is adjustable for different applications by adding an external resistor divider network. The network attenuates the reference voltage, allowing the user to select an output voltage higher or lower than the internal reference voltage. The L78L12ACD13TR also includes an amplifier stage that amplifies the feedback signal and regulates the output voltage. It also has internal protection circuitry, which provides protection against overloads, and can disable the internal error amplifier if the voltage falls out of regulation.

Advantages of the L78L12ACD13TR

The L78L12ACD13TR has several advantages. It can operate over a wide input voltage range of 1.2 to 18 V, with a single 5 V output. It is also very efficient and offers low noise levels. Additionally, the regulator has a wide temperature range of -40° to 125° C and high stability over a long period.

The L78L12ACD13TR is a high performance linear regulator with good protection and regulation features. It is a reliable choice for applications that require a stable voltage supply. It is an excellent choice for a variety of uses, from computers and microcontrollers to medical equipment and audio amplifiers.

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