STMicroelectronics

LD2981CU33TR  

Linear & Switching Voltage Regulators

LD2981CU33TR Description

The LD2981CU33TR is a high-performance linear voltage regulator from STMicroelectronics, designed to provide a stable 3.3V output with a maximum current of 100mA. This device is ideal for applications requiring low-dropout regulation and low quiescent current, making it suitable for battery-powered systems and other power-sensitive applications.

LD2981CU33TR Features

• Fixed Output Voltage: The LD2981CU33TR provides a fixed output voltage of 3.3V, ensuring consistent performance across a wide range of input voltages.
• Low Dropout Voltage: With a maximum dropout voltage of 0.375V at 100mA, this regulator maintains high efficiency even under heavy load conditions.
• Low Quiescent Current: The device consumes only 150 µA in quiescent mode, making it ideal for battery-powered applications where power consumption is critical.
• Excellent PSRR: The LD2981CU33TR boasts a power supply rejection ratio (PSRR) of 63dB at 1kHz, ensuring minimal noise coupling from the input to the output.
• Protection Features: This regulator includes over-current and over-temperature protection, safeguarding the device and the system it powers.
• RoHS Compliance: The LD2981CU33TR is compliant with RoHS3 standards, making it suitable for environmentally conscious designs.
• REACH Unaffected: This product is not affected by REACH regulations, ensuring uninterrupted supply and compliance with European chemical safety standards.

LD2981CU33TR Applications

The LD2981CU33TR is an excellent choice for a variety of applications where stable, low-noise voltage regulation is required:

• Portable Electronics: Due to its low quiescent current and small form factor, this regulator is ideal for powering portable devices such as smartphones, tablets, and wearables.
• Industrial Control Systems: The LD2981CU33TR's stability and low-dropout characteristics make it suitable for use in industrial control systems where reliable power regulation is critical.
• Automotive Applications: This regulator can be used in automotive systems where low power consumption and high reliability are essential, such as infotainment systems and sensor interfaces.

Conclusion of LD2981CU33TR

The LD2981CU33TR from STMicroelectronics stands out for its combination of low quiescent current, low dropout voltage, and excellent PSRR, making it a top choice for power-sensitive applications. Its fixed 3.3V output, coupled with robust protection features and compliance with environmental standards, positions it as a reliable solution for a wide range of electronic systems. Whether in consumer electronics, industrial control, or automotive applications, the LD2981CU33TR delivers the performance and reliability needed for today's demanding power regulation requirements.

LD2981CU33TR Documents

Download datasheets and manufacturer documentation for LD2981CU33TR