Texas Instruments

LP3990SD-2.8/NOPB

LP3990SD-2.8/NOPB Description

The LP3990SD-2.8/NOPB is a linear voltage regulator designed by Texas Instruments, offering a fixed output voltage of 2.8V and a maximum output current of 150mA. This device is housed in a 6-lead WSON package, suitable for surface mount applications. Despite being marked as obsolete, it remains a reliable choice for applications requiring a stable power supply with low dropout voltage and efficient power management.

LP3990SD-2.8/NOPB Features

• Output Type: Fixed at 2.8V, ensuring a consistent power supply for sensitive electronic components.
• Input Voltage Range: Capable of handling up to 6V, providing flexibility in power source options.
• Output Current: Delivers a maximum of 150mA, sufficient for powering various low-power devices and microcontrollers.
• Low Dropout Voltage: With a maximum dropout voltage of 0.2V at 150mA, it maintains high efficiency even at low input-to-output voltage differentials.
• Low Quiescent Current: Features a quiescent current of 80 µA, minimizing power consumption in standby or low-load conditions.
• Control Features: Includes an enable pin, allowing for dynamic control of the regulator's operation.
• Protection Features: Equipped with over-temperature and short-circuit protection, ensuring robustness and reliability in various operating conditions.
• Performance: Offers a power supply rejection ratio (PSRR) ranging from 55dB to 35dB across frequencies from 1kHz to 10kHz, effectively filtering out noise from the input power.
  supply- Compliance: Complies with REACH and ROHS3 standards, ensuring environmental safety and regulatory compliance.
• Moisture Sensitivity Level: MSL 1 (Unlimited), suitable for a wide range of manufacturing environments without additional moisture protection.

LP3990SD-2.8/NOPB Applications

The LP3990SD-2.8/NOPB is ideal for applications where a stable, low-voltage power supply is required. Its low dropout voltage and efficient power management make it suitable for battery-powered devices, portable electronics, and embedded systems. Specific use cases include:

• Battery-Powered Devices: Ideal for applications where the voltage input may drop close to the required output voltage, such as in handheld devices or wearables.
• Microcontroller Power Supply: Provides a stable 2.8V supply for microcontrollers and other low-power ICs, ensuring reliable operation.
• Low-Power Embedded Systems: Suitable for applications requiring minimal power consumption and efficient power management, such as IoT devices and sensor networks.
• Portable Electronics: Can be used in portable devices where space and power efficiency are critical, such as digital cameras, portable media players, and smartwatches.

Conclusion of LP3990SD-2.8/NOPB

The LP3990SD-2.8/NOPB is a versatile and reliable linear voltage regulator, offering a fixed 2.8V output with a maximum current of 150mA. Its low dropout voltage and low quiescent current make it an efficient choice for battery-powered and low-power applications. Despite being marked as obsolete, its robust design and compliance with industry standards ensure it remains a viable option for engineers and designers. The inclusion of enable control and protection features further enhances its usability and reliability in various electronic systems.