S-13R1A20-I4T1U3

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A voltage regulator is a component that limits, regulates, or controls the amount of voltage for an electrical device, which is an essential component whenever an unregulated or varying DC voltage needs to be converted into a constant, stable output voltage. Linear voltage regulators are the most commonly used and simple regulator circuits, and there are many different types used in different applications. The S-13R1A20-I4T1U3 is a linear voltage regulator from STMicroelectronics that is typically used in industrial, medical, and automotive applications. In this article, we will cover the application field, features, and working principle of the S-13R1A20-I4T1U3.

The S-13R1A20-I4T1U3 is a monolithic integrated low-dropout (LDO) linear regulator that provides a regulated output voltage of up to 20V. The device is available in a thermally enhanced SOT-223 package and features an integrated reverse polarity protection, thermal shutdown, power transient protection, and a low dropout voltage. The device also features an input voltage range of 2.6V to 28V, and it can provide up to 1.5A of output current with a maximum quiescent current of only 82μA. In addition, the device is able to support a wide range of industrial, medical, and automotive applications, such as digital video amplifiers, microcontrollers, control logic, and audio amplifiers.

The S-13R1A20-I4T1U3 is based on a three terminal design consisting of an input voltage, output voltage, and ground terminals. The input voltage is applied to the input pin, and the output voltage is controlled by the voltage across the two terminals. The voltage regulator is configured with an internal series pass element consisting of a PMOS transistor and a resistor connected in series. The output voltage VOUT is regulated across the terminals of the series pass element with the help of the internal voltage reference VREF. The voltageerror amplifier senses the difference between VOUT and VREF and adjusts the gate voltage of the series pass element by varying the current through the resistor. This adjustable current adds to or subtracts from the reference current, and thus the output voltage is regulated.

In addition to providing a regulated output voltage, the S-13R1A20-I4T1U3 also provides protection against over-current and reverse-battery conditions. Over-current protection is provided by an internal current limit circuit, which limits the output current to 1.5A. In the event of a reverse-battery condition, the device will shut off and the internal reverse-battery protection circuit will prevent the output voltage from reaching too high a level. Furthermore, the device is capable of withstanding power transients up to 1s and it offers a low dropout voltage of 0.86V at full load.

In summary, the S-13R1A20-I4T1U3 is a linear voltage regulator from STMicroelectronics that is typically used in industrial, medical, and automotive applications. The device provides a regulated output voltage of up to 20V, and it features an input voltage range of 2.6V to 28V. It offers up to 1.5A of output current with a maximum quiescent current of only 82μA. The device is based on a three terminal design and consists of a series pass element to regulate the output voltage. Furthermore, it includes protection against over-current, reverse-battery conditions,and power transients.

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