L4995RJ

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PMIC - Voltage Regulators - Linear - L4995RJ Application Field and Working Principle

The L4995RJ is a monolithic linear voltage regulator with a low-power consumption and very low noise that makes it especially suitable for medium voltage/current applications. This voltage regulator is able to maintain output voltage stability at very low ESR (effective series resistance) or high-capacitance load conditions. It is also capable of driving loads from very low to very high currents. The L4995RJ is a high-input voltage and wide operating temperature range voltage regulator for low to medium voltage/current applications. The L4995RJ uses a combination of current limiting, foldback current limiting and thermal foldback protection to maximize safety and reduce power dissipation.

The maximum output current of the L4995RJ is 1.5A, and the output voltage is adjustable from 1.5V to 5.5V, with a selectable output voltage accuracy of 1-2%. The L4995RJ is an ideal choice for applications that need to provide extremely clean, stable and linear output signals, such as when powering wireless communication and other sensitive circuits; when working with high-speed data acquisition systems. It is also compatible with various protection circuits.

The main application field of the L4995RJ linear voltage regulator is in microprocessors and embedded systems. The L4995RJ is often used for notebooks, audio systems, medical systems, industrial controllers, and digital devices, where low power dissipation is required. It is also suitable for any application that needs low-power voltage regulation and regulated current limiting. The L4995RJ can be used to power the following devices: cell phones, tablets, wearable electronic devices, laptops, and embedded systems.

The working principle of the L4995RJ linear voltage regulator is based on the following components: a series pass transistor, a shunt regulator, and an internal current source. The series pass transistor functions as an adjustable resistor to determine the output voltage. The shunt regulator functions to absorb the over-current generated by the series pass transistor and provide current limiting, while the current source function to provide precise control over the output current. The output current is adjustable, allowing the L4995RJ to support a wide range of load currents. Additionally, the L4995RJ uses a thermally-activated protection circuit to protect the chip from over-temperature.

In summary, the L4995RJ is an excellent linear voltage regulator with wide application fields and precise working principle. It offers a variety of adjustable output voltages and current limits, and is ideal for low-power applications. The device also includes a wide range of protection circuits, which makes it a safe choice for any high-input voltage applications. It is a great choice for regulating voltage in any microcontrollers, embedded systems, and digital devices.

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