L78S75CV-DG

The L78S75CV-DG is a voltage regulator of the PMIC type, comes the linear voltage regulator category. It is a three terminal positive voltage regulator, offering specified thermal and output current performance.

The L78S75CV-DG offers a wide range of output voltage. Versions with fixed voltage are available with output voltage ranging from 5 V to 12 V and adjustable voltage versions can be set at any voltage in the range 1.2 V to 37 V. This product also has an integrated active current limiter to ensure load protection.

Application field

The L78S75CV-DG is a high performance linear voltage regulator with a low dropout voltage of just 0.8V. This makes it ideal for any application where the input supply can vary in the range of 1.2V to 37 V. Some typical applications for this voltage regulator include:

• Automotive
• Industrial
• CNCs and Robotics
• LEDs
• Battery Management
• SMPS

Working principle

The L78S75CV-DG is a three terminal positive voltage regulator with a fixed or adjustable output voltage. It features an active current limiter, thermal overload protection and reverse-polarity protection. Specifically, the device’s active current limiter prevents output current overload and shut down the voltage regulator in case of an overload. In addition, it has an internal thermal overload protection that increases the junction temperature in case of an overload.

The working principle of the L78S75CV-DG can be described as follows. The device compares a reference voltage to the input voltage and adjusts the output voltage accordingly. Its output is regulated by varying the transconductance of an internal NPN pass transistor. In normal operation, this pass transistor is biased into conduction in order to maintain the output voltage of the device. In the event of an overload, the pass transistor is biased such that the output current is limited, resulting in a drop in output voltage.

The L78S75CV-DG is widely used due to its low dropout voltage, high power dissipation, wide input voltage range and low cost. Its precise output voltage regulation and excellent precision make it especially suitable for critical applications such as telecommunications, battery management systems and portable devices.

Since the device is entirely self-contained and integrated, it does not require any external components for operation. In addition, the device is designed to operate over a wide temperature range, making it suitable for hostile and extreme operating environments.