S-13R1H38-N4T1U3

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S-13R1H38-N4T1U3 is a kind of linear voltage regulator which belongs to the field of PMIC (Power Management Integrated Circuit). It is designed for 6V-30V input voltage applications, such as automotive and industrial applications, providing solutions for stable output voltage and accurate current regulation.

Linear voltage regulators are voltage regulators based on DC-DC buck or boost converter topologies and have a voltage feedback loop with on-off switching of the power switches. Linear regulators use series pass elements like FET power switch or BJT transistor to regulate the output voltage. This type of regulators are capable of providing precise and stable output voltage. Normally series pass element is the key to control the output voltage of the circuit.

The S-13R1H38-N4T1U3 is a hybrid integrated low dropout (LDO) voltage regulator for a wide range of 6V-30V input voltage applications, including automotive and industrial applications. It combines wide input voltage range, low noise and low dropout voltage in a small package. The S-13R1H38-N4T1U3 regulates both current and voltage using a PMOS pass transistor for current regulation and an NMOS pass transistor for voltage regulation.

The power switch, which is a PMOS transistor, is triggered by an internal voltage reference and is used to regulate the output current by switching the power switch on and off. The voltage reference is necessary to guarantee stable output voltage, while the current is regulated by the duty cycle of the power switch. When the output current is increasing, the duty cycle increases, and the duty cycle decreases when the output current is decreasing.

The NMOS transistor, which is the voltage regulator, is used to regulate the output voltage of the circuit. This transistor operates in the saturation region, which enables the transistor to regulate the output voltage accurately. The NMOS transistor acts as a variable resistor, allowing the input voltage to drop while keeping the regulated output voltage.

The combination of a PMOS transistor for current regulation and an NMOS transistor for voltage regulation makes S-13R1H38-N4T1U3 a very reliable, precise, and stable voltage regulator for automotive and industrial applications. The S-13R1H38-N4T1U3 is and capable of providing accurate output voltage and current regulation with a wide range of input voltages, making it an attractive choice for applications requiring precise voltage and current regulation with low dropout voltage.

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