L78S05CV

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The L78S05CV regulator is a three-terminal negative 5V voltage regulator. Rated voltage is 5V, max output current is 0.8A, max power dissipation is 500mW and max dropout voltage is 1.5V at 0.8A. The max quiescent current is 3mA. The regulator is stable with an output capacitor of 1uF, and more capacitance can be used.

The L78S05CV is commonly used in applications requiring a low cost regulated supplies from a wide variety of sources. These applications include computers, handheld devices, automotive systems and –telecommunications. It is also widely used in industrial control and communications.

The L78S05CV is a linear regulator and works by regulating the output voltage relative to an internal reference voltage. When the input voltage is at least 2V higher than the output, the voltage operates with a constant voltage difference of 2V. To regulate the output voltage, the L78S05CV utilizes a 3-terminal configuration with a current-limiting and thermal-shutdown feature.

The voltage regulator is a closed loop feedback system. There is a temperature-compensated reference, an error amplitude, an internal amplifier, and a series pass element. In a linear regulator, the output voltage is proportional to the voltage reference. The voltage reference is based on a precise bandgap voltage. The error amplifier compares the reference voltage to the actual output voltage. If the output falls below the reference, the error amplifier turns the series pass element on and the output voltage rises until it matches the reference.

The L78S05CV includes protection features such as current-limiting and thermal-shutdown. The current limiting prevents excessive current from being drawn from the IC. The thermal shutdown feature shuts down the IC when the temperature reaches beyond its limits. This helps to protect the IC from being damaged due to overheating.

The L78S05CV is designed for a wide range of applications. It can be used for unregulated battery source or for any power supply with a wide input range. It is also an ideal solution in designs where multiple other voltage rails are required. With its low dropout voltage, the L78S05CV can deliver a regulated output voltage and can dissipate more than 500 milliwatts of power, and it has a wide input voltage range of up to 15V.

The L78S05CV is capable of delivering up to 0.8A of output current which is more than adequate for most applications. It is also suitable for use in automotive applications, thanks to its low dropout voltage and wide operating temperature range of -40 ̊C to 125 ̊C. All in all, the L78S05CV is a reliable and robust 3-terminal linear voltage regulator.

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