ST2L05-3300PT

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PMIC - Voltage Regulators - Linear

ST2L05-3300PT is a low power, high performance Integrated circuit from STMicroelectronics. It is a 4-channel Linear voltage regulator (LVR) type that provides an output voltage range from 1.2V – 3300mV adjustable with a 0.25mV resolution. This voltage regulator has high accuracy and very low noise, making them ideal for a wide range of applications, especially those that require precision control and low noise output.

Application Field

The ST2L05-3300PT can be used in a wide range of applications and industries, depending on the power and voltage requirements. Some of its common applications are:

• Power systems: This type of LVR can be used as an efficient power supply unit in power systems, which require precise voltage and current control. It is also used to protect sensitive components from power variation or inrush current.
• Industrial equipment: The ST2L05-3300PT is used in industrial equipment such as PLCs, motor controllers, and other industrial machinery, to regulate the voltage supply to the system.
• Automotive electronics: This regulator is also used in automotive electronics for precise voltage regulation, for example for controlling fuel injection, airbags, and lighting systems.
• Telecommunications: Telecommunication systems, such as radio access networks, use the ST2L05-3300PT to control the supply voltage to modules and other components.
• Consumer electronics: This LVR is used in consumer electronics devices, such as cell phones, tablets, digital cameras, and other electronic products, to regulate the voltage supply to the system.

Working Principle

The ST2L05-3300PT features an adjustable output voltage range of 1.2V to 3300mV with 0.25mV resolution. It is based on a linear regulation technique, which consists of a variable voltage source, an error voltage amplifier, and an output current controller. This type of voltage regulator also includes a voltage buffer, which adds stability and reduces transient response time in the system.

The variable voltage source is effectively a voltage divider, created by two resistors R1 and R2. The ST2L05-3300PT can be programmed to provide different output voltages by changing the ratio of resistance. The voltage buffer helps to minimize the ripple at the output and also prevent the errors in regulation due to the load variations.

The error voltage amplifier compares the output voltage and the reference voltage, which is used to set the desired output voltage. When the output voltage exceeds the set reference point, the error voltage amplifier will work to reduce the output voltage by reducing the current. Similarly, if the output voltage is less than the set reference point, the error voltage amplifier will work to increase the output voltage by increasing the current.

The output current controller monitors the current flowing through the output terminals, adjusting the current level in order to maintain the desired output voltage. The controller also includes a variety of safety features, such as over-voltage and over-temperature protection, to ensure that the system is operated under safe conditions.

Overall, the ST2L05-3300PT is designed to provide precise, low noise voltage regulation in power systems, industrial equipment, and consumer electronics. With its high accuracy and low noise, this voltage regulator is ideal for a wide range of applications.

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