Texas Instruments

LP2981-33DBVRG4

LP2981-33DBVRG4 Description

The LP2981-33DBVRG4 is a fixed-output linear voltage regulator designed by Texas Instruments, offering a stable 3.3V output voltage with a maximum output current of 100mA. This regulator is housed in a compact SOT23-5 package, making it ideal for space-constrained applications. The device features a maximum input voltage of 16V and a low dropout voltage of 0.37V at 100mA, ensuring efficient operation even at low input-to-output voltage differentials. The LP2981-33DBVRG4 also includes an enable control feature, allowing for dynamic power management and reduced power consumption during standby modes.

LP2981-33DBVRG4 Features

• Fixed Output Voltage: Provides a stable 3.3V output, suitable for a wide range of applications requiring a fixed supply voltage.
• Low Dropout Voltage: With a maximum dropout voltage of 0.37V at 100mA, this regulator maintains high efficiency even at low input-to-output voltage differences.
• Enable Control: The enable feature allows for dynamic power management, enabling the regulator to be turned on and off as needed, reducing power consumption during idle periods.
• Protection Features: Integrated over-current, over-temperature, and short-circuit protection ensure robustness and reliability in various operating conditions.
• Low Quiescent Current: A quiescent current of 95µA minimizes power loss during normal operation, enhancing overall system efficiency.
• High Power Supply Rejection Ratio (PSRR): The 63dB PSRR at 1kHz helps in filtering out noise from the input supply, resulting in a cleaner output voltage.
• Surface Mount Package: The SOT23-5 package is suitable for surface mount technology, facilitating easy integration into printed circuit boards and compact designs.
• Compliance: The LP2981-33DBVRG4 is REACH unaffected and RoHS3 compliant, ensuring it meets environmental and regulatory standards.

LP2981-33DBVRG4 Applications

The LP2981-33DBVRG4 is well-suited for a variety of applications where a stable 3.3V supply is required. Its low dropout voltage and compact size make it particularly ideal for:

• Battery-Powered Devices: The low dropout voltage ensures efficient operation even as the battery voltage drops, extending device runtime.
• Portable Electronics: The small SOT23-5 package and low quiescent current make it suitable for space-sensitive applications such as smartphones, tablets, and wearables.
• Embedded Systems: Provides a reliable power supply for microcontrollers, sensors, and other low-power components in embedded systems.
• Communication Devices: Ensures stable power supply for RF modules and other communication components, maintaining signal integrity and performance.

Conclusion of LP2981-33DBVRG4

The LP2981-33DBVRG4 is a versatile and efficient linear voltage regulator designed to meet the demands of modern electronic systems. Its fixed 3.3V output, low dropout voltage, and enable control feature make it an excellent choice for applications requiring stable power supply and dynamic power management. The inclusion of over-current, over-temperature, and short-circuit protection ensures reliability and robustness in various operating conditions. While the product is marked as obsolete, its unique features and performance benefits continue to make it a valuable component for specific applications. For designers seeking a compact, efficient, and reliable power solution, the LP2981-33DBVRG4 remains a compelling option.