L7885CV

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The L7885CV is an example of the Linear voltage regulator. It is classified under PMIC, or power management integrated circuits. Linear voltage regulators regulate the output voltage of a power supply, and provides linear regulation. In contrast to switching regulators, these provide lower efficiency and are suitable for small currents and low power applications.

The L7885CV is a wide input voltage range, low dropout linear regulator with 5.0V fixed output voltage. The device supports output currents up to 0.3A with a dropout voltage of 500mV. The device also has low quiescent current and low temperature coefficient. Other features include low noise, integrated shutdown, output enable, and over current protection.

This particular linear voltage regulator has a wide input voltage range from 4.4V to 40V for use with automotive, battery powered, and primary sources. The output voltage is 5.0V and rate current is 0.3A. The part provides protection against longitudinal current, reverse current, and inductive load. It is RoHS compliant and the temperature range is -40°C to +125°C.

On the technical level, the L7885CV consists of an active voltage-regulating circuit and a built-in power transistor which is the output stage. Its working principle is simple and elegant. It compares the preset reference voltage to the output voltage and regulates the output voltage to match the reference voltage. This circuit is called the error amplifier, whose job is to compare the reference voltage and output voltage. It then controls the output of the power transistor according to variations in the input voltage. The power transistor serves as the switch and final amplifier in the overall power management circuit.

Applications for the L7885CV device include computers, peripherals, telecommunications, instrumentation equipment and many other types of systems where a precise voltage regulation is needed. Additionally, this device can be used as a reference voltage and temperature compensation voltage in digital and analog electronics, temperature controllers and power supplies.

In summary, the L7885CV is a wide input voltage range, low dropout linear regulator with 5.0V fixed output voltage. It is suitable for use with automotive, battery powered, and primary sources and provides protection against longitudinal current, reverse current, and inductive load. It supports output currents up to 0.3A with a dropout voltage of 500mV and provides low quiescent current, low temperature coefficient, and low noise. Its applications include computers, peripherals, telecommunications, instrumentation equipment and many other types of systems where a precise voltage regulation is needed.

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