L4949EP-E

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Linear voltage regulators are widely used in many devices.They can safely and efficiently control the output voltage of the power supply, providing stable power for a variety of products.The L4949EP-E is a low cost 3-terminal linear voltage regulator designed by STMicroelectronics.It is designed specially for controlling of large currents, and can bear a maximum total output current of 3A.

The L4949EP-E is a highly efficient three-terminal linear regulator that offers a wide range of input and output voltage capabilities. It has an adjustable output voltage range from 1.5V to 52V, a maximum ripple rejection of 87dB, and a low dropout voltage of 0.8V. It also has short-circuit protection, thermal shutdown and reverse-polarity protection. Furthermore, the L4949EP-E features an ultra-low quiescent current of 7.2mA and an output current of 3A, making it suitable for many power supply applications.

The application fields of the L4949EP-E are widespread.For example, industrial systems, power supply converters, automotive DC/DC converters and power adaptors for general consumer products.These applications require high efficiency, low noise and a wide voltage range, so the L4949EP-E is the perfect choice.In addition, it can also be used in DC motor controls and solar powered electronic products.Due to its high efficiency and low dropout voltage, the L4949EP-E can be used in low voltage applications where other linear voltage regulators cannot.

The working principle of the L4949EP-E is quite simple.A voltage reference is used to compare the input voltage to the desired output voltage.When the two voltages differ by more than a small amount, an error amplifier is triggered and it controls the base current of a series pass NPN transistor.The current is regulated by adjusting Vbe of the series pass NPN transistor and controlling the output voltage.

The L4949EP-E offers superior performance, making it an ideal choice for many systems.It has a wide range of input and output voltages, low dropout voltage and a high ripple rejection capability.In addition, it has short-circuit protection and can bear a maximum total output current of 3A.Furthermore, its ultra-low quiescent current makes it the perfect regulator for applications that require low power consumption and low noise.

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