Texas Instruments

LP2981-33DBVTE4

LP2981-33DBVTE4 Description

The LP2981-33DBVTE4 is a fixed-output linear regulator designed for applications requiring a stable 3.3V output voltage with a maximum output current of 100mA. Manufactured by Texas Instruments, this regulator is part of the Power Management Integrated Circuit (PMIC) category and is housed in a compact SOT23-5 package, making it suitable for surface mount applications. Despite its small form factor, the LP2981-33DBVTE4 offers robust performance features, including low dropout voltage, high power supply rejection ratio (PSRR), and comprehensive protection mechanisms.

LP2981-33DBVTE4 Features

• Output Type: Fixed at 3.3V, ensuring a stable voltage supply for sensitive electronic components.
• Input Voltage Range: Capable of handling input voltages up to 16V, providing flexibility in various power supply scenarios.
• Output Current: Delivers a consistent 100mA, sufficient for powering a wide range of low-power devices.
• Low Dropout Voltage: With a maximum dropout voltage of 0.37V at 100mA, the regulator maintains efficiency even under low input-to-output voltage differentials.
• High PSRR: Achieves a power supply rejection ratio of 63dB at 1kHz, minimizing noise and ripple in the output voltage.
• 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 reliable operation and safeguarding against potential faults.
• Low Quiescent Current: Consumes only 95 µA in quiescent mode, optimizing power efficiency in low-power applications.
• Compliance and Packaging: RoHS3 compliant and REACH unaffected, ensuring environmental safety. Packaged in a tape and reel format, facilitating automated assembly processes.

LP2981-33DBVTE4 Applications

The LP2981-33DBVTE4 is ideal for a variety of applications where a reliable, low-power, and stable voltage supply is. required Key use cases include:

• Embedded Systems: Provides a stable power source for microcontrollers, sensors, and other low-power components in embedded devices.
• Portable Electronics: Suitable for battery-operated devices, where low dropout voltage and low quiescent current are critical for maximizing battery life.
• Communication Devices: Ensures clean power supply for RF modules and other sensitive communication components, thanks to its high PSRR.
• Industrial Control: Offers robust performance and protection features, making it suitable for industrial applications where reliability and durability are paramount.

Conclusion of LP2981-33DBVTE4

The LP2981-33DBVTE4 is a versatile and reliable linear regulator that stands out due to its low dropout voltage, high PSRR, and comprehensive protection features. Its compact SOT23-5 package and surface mount compatibility make it an excellent choice for space-constrained designs. While the product is marked as obsolete, its performance characteristics and compliance with industry standards ensure that it remains a viable option for applications requiring a stable 3.3V supply. For engineers and designers seeking a dependable power management solution, the LP2981-33DBVTE4 offers a compelling combination of performance, efficiency, and reliability.