Texas Instruments

LP2981-33DBVTG4

LP2981-33DBVTG4 Description

The LP2981-33DBVTG4 is a fixed output linear regulator designed by Texas Instruments, offering a robust and efficient solution for power management applications. This IC provides a stable 3.3V output with a maximum current capability of 100mA. It features a low dropout voltage of 0.37V at 100mA, ensuring high efficiency even at low input voltages. The regulator is housed in a compact SOT23-5 package, making it suitable for space-constrained designs. Despite its small size, the LP2981-33DBVTG4 includes essential protection features such as over-current, over-temperature, and short-circuit protection, ensuring reliable operation under various conditions.

LP2981-33DBVTG4 Features

• Output Type: Fixed 3.3V output voltage, providing a stable power supply for sensitive electronic components.
• Input Voltage Range: Capable of handling input voltages up to 16V, offering flexibility in power source selection.
• High Efficiency: With a dropout voltage of only 0.37V at 100mA, the regulator maintains high efficiency even at low input-to-output voltage differentials.
• Low Quiescent Current: Features a low quiescent current of 95 µA, minimizing power consumption in standby or low-load conditions.
• High PSRR: Achieves a power supply rejection ratio (PSRR) of 63dB at 1kHz, effectively filtering out noise from the input supply.
• Control Features: Includes an enable pin, allowing for dynamic control of the regulator's operation.
• Protection Features: Equipped with over-current, over-temperature, and short-circuit protection, ensuring safe and reliable operation.
• Compliance: Meets REACH and RoHS3 compliance standards, ensuring environmental and safety standards are met.
• Mounting Type: Surface mount technology (SMT) with a moisture sensitivity level (MSL) of 1, suitable for automated assembly processes.

LP2981-33DBVTG4 Applications

The LP2981-33DBVTG4 is ideal for a variety of applications where a stable and efficient power supply is required. Its compact size and low dropout voltage make it particularly suitable for portable and battery-operated devices. Some specific use cases include:

• Portable Electronics: Ideal for powering sensitive components in devices such as smartphones, tablets, and wearable technology.
• Industrial Applications: Suitable for powering sensors and microcontrollers in industrial control systems.
• Medical Devices: Provides a reliable power source for low-power medical equipment, ensuring stable operation.
• Communication Equipment: Can be used in routers, modems, and other communication devices to power critical components.

Conclusion of LP2981-33DBVTG4

The LP2981-33DBVTG4 from Texas Instruments is a versatile and efficient linear regulator designed to meet the demands of modern power management applications. Its low dropout voltage, high PSRR, and comprehensive protection features make it a reliable choice for a wide range of devices. Despite its small form factor, the regulator offers robust performance and compliance with industry standards. While it is marked as obsolete, the LP2981-33DBVTG4 remains a valuable component for applications requiring a stable 3.3V supply with low power consumption and high efficiency.