National Semiconductor

LP2981IM5-3.3

LP2981IM5-3.3 Description

The LP2981IM5-3.3 is a micro-power linear voltage regulator designed by National Semiconductor, offering a fixed 3.3V output voltage with a maximum output current of 100mA. This device is optimized for low power consumption, making it ideal for applications where energy efficiency is critical. The LP2981IM5-3.3 features a quiescent current of only 95 µA and a maximum supply current of 1.7 mA, ensuring minimal power loss even under no-load conditions. The regulator operates with an input voltage range up to 16V and has a dropout voltage of 0.37V at 100mA, allowing it to maintain regulation even with small differences between input and output voltages.

LP2981IM5-3.3 Features

• Low Quiescent Current: With a quiescent current of 95 µA, the LP2981IM5-3.3 is highly efficient, making it suitable for battery-powered and low-power applications.
• High PSRR: The regulator offers a power supply rejection ratio (PSRR) of 63dB at 1kHz, ensuring excellent noise filtering and stable output voltage.
• Fixed Output Voltage: The device provides a fixed 3.3V output, simplifying design and eliminating the need for external voltage-setting resistors.
• Overcurrent and Overtemperature Protection: Integrated protection features safeguard the regulator against overcurrent, overtemperature, and short-circuit conditions, enhancing reliability and longevity.
• Enable Control: The enable feature allows for dynamic control of the regulator's operation, enabling power savings and efficient power management.
• Surface Mount Packaging: The LP2981IM5-3.3 is available in a surface mount package, facilitating easy integration into compact and high-density designs.
• Moisture Sensitivity Level: The device has a vendor-defined moisture sensitivity level, ensuring compatibility with various manufacturing processes.

LP2981IM5-3.3 Applications

The LP2981IM5-3.3 is well-suited for a variety of applications where low power consumption and stable voltage regulation are essential. Key applications include:

• Battery-Powered Devices: Ideal for portable electronics, such as smartphones, tablets, and wearable devices, where energy efficiency and long battery life are crucial.
• Low-Power Systems: Suitable for microcontroller-based systems, IoT devices, and other applications requiring minimal power draw.
• Medical Devices: Applicable in medical equipment where reliability and low power consumption are paramount.
• Industrial Controls: Useful in industrial automation and control systems that require stable power supply with minimal power loss.

Conclusion of LP2981IM5-3.3

The LP2981IM5-3.3 from National Semiconductor stands out as a highly efficient and reliable micro-power linear voltage regulator. Its low quiescent current, high PSRR, and fixed output voltage make it an excellent choice for applications demanding minimal power consumption and stable voltage regulation. The inclusion of overcurrent, overtemperature, and short-circuit protection features further enhances its robustness and reliability. With its surface mount packaging and enable control, the LP2981IM5-3.3 offers design flexibility and ease of integration into compact and high-density systems. Whether powering battery-operated devices or low-power industrial controls, the LP2981IM5-3.3 delivers outstanding performance and efficiency, making it a preferred choice in the power management industry.