The LD2981CM33TR is a highly precise and reliable voltage regulator designed and manufactured by STMicroelectronics, a global leader in semiconductor solutions. This component is part of the LD2981 series, which is known for its low dropout performance and is particularly suitable for battery-powered devices where extended battery life is crucial.

Key Features

• Output Voltage: The LD2981CM33TR provides a fixed output voltage of 3.3V, which is ideal for powering microcontrollers and other digital logic circuits that require a stable voltage supply.
• Low Dropout Voltage: With a low dropout voltage of typically 120 mV at 100 mA load, this regulator can operate effectively even when the input voltage is very close to the output voltage, maximizing battery life.
• Output Current: It is capable of delivering up to 100 mA of output current, making it suitable for a range of low-power applications.
• High Accuracy: The output voltage tolerance is exceptionally tight, within ±1%, ensuring precise voltage regulation for sensitive electronic components.
• Low Quiescent Current: The device features a low quiescent current of typically 0.2 μA in off mode and 500 μA in on mode, which contributes to the overall energy efficiency of the application.
• Thermal Shutdown and Current Limiting: Built-in thermal shutdown and current limiting features provide protection against overheating and overcurrent conditions, enhancing the reliability and longevity of both the regulator and the application it is used in.

Applications

The LD2981CM33TR voltage regulator is versatile and can be used in a variety of applications, such as:

• Mobile phones and personal digital assistants (PDAs)
• Battery-powered devices and portable electronics
• Microcontroller power supply
• Peripheral power supply

Its small footprint, provided in a SOT-23-5 package, makes it an excellent choice for space-constrained applications. The LD2981CM33TR is characterized by its high performance, reliability, and energy efficiency, making it an essential component in modern electronic designs.