LM137H

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PMIC - Voltage Regulators - Linear is an important category in the field of electrical engineering. Power management integrated circuits (PMICs) regulate power output, helping to regulate voltage and current in a circuit. The LM137H, or Low Dropout Positive Adjustable Voltage Regulator, is an example of one of the many components in this field. This article will look at its application field and working principle.

The LM137H is a 3-terminal adjustable positive voltage regulator. It provides 5A output current at a voltage ranging from 1.2V to 37V, allowing users to adjust the output voltage according to their requirements. The LM137H is effectively a complex and adjustable linear voltage regulator. It is most suitable for applications with high input and output voltage requirements.

The LM137H has wide inputs with matched pair output devices for superior AC and DC line regulations. Its tight voltage regulation within ±1V makes it highly efficient, and its temperature-compensated current limit circuitry ensures safe and reliable operation. The LM137H also has a low quiescent current, enabling it to be used in battery-powered devices.

The LM137H provides voltage regulation by generating a reference voltage. The reference voltage is regulated by controlling the voltage to a feedback node with a N-MOSFET pass element. This reference voltage is then compared to a voltage divider on the feedback node. When there is a difference between the two, the N-MOSFET pass element causes a change in the feedback loop until the two voltages match. In this way the voltage at the output can be adjusted and regulated.

The LM137H is suitable for a wide range of applications including industrial, telecommunications, home appliances, and automotive electronic systems. It is especially useful where there is a need to automatically generate voltage while providing ideal current regulation. The device can be used to add adjustable positive regulation to a circuit, making it an ideal choice for devices that require a wide range of voltage regulation.

To sum up, the LM137H is an excellent 3-terminal adjustable linear voltage regulator. It offers a wide input and output voltage range, tight voltage regulation, low quiescent current, and temperature-compensated current limit circuitry. It is suitable for a wide range of applications including industrial, telecommunications, home appliances, and automotive electronic systems. The device is an excellent choice for use in devices that require wide range adjustable positive regulation.

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