Texas Instruments

LP2981A-30DBVTE4

LP2981A-30DBVTE4 Description

The LP2981A-30DBVTE4 is a fixed-output linear regulator designed for applications requiring a stable 3V output with a maximum current of 100mA. Manufactured by Texas Instruments, this regulator is part of the Power Management Integrated Circuit (PMIC) category and is housed in a Surface Mount SOT23-5 package. Despite being marked as obsolete, the LP2981A-30DBVTE4 remains a reliable choice for various low-power applications due to its robust design and performance characteristics.

LP2981A-30DBVTE4 Features

• Output Type: Fixed at 3V, ensuring a stable voltage supply for sensitive electronics.
• Input Voltage Range: Capable of handling input voltages up to 16V, providing flexibility in power source options.
• Output Current: Delivers a maximum output current of 100mA, suitable for low-power devices.
• Low Dropout Voltage: With a maximum dropout voltage of 0.37V at 100mA, the regulator maintains efficiency even at low input-to-output voltage differentials.
• Low Quiescent Current: Features a quiescent current of 95 µA, minimizing power consumption in standby mode.
• High Power Supply Rejection Ratio (PSRR): Achieves 63dB at 1kHz, effectively filtering out noise from the power supply.
• Protection Features: Includes over-current, over-temperature, and short-circuit protection, enhancing reliability and longevity.
• Enable Control: Offers an enable feature for power control, allowing for dynamic power management.
• Compliance: Complies with REACH and ROHS3 standards, ensuring environmental safety and regulatory adherence.
• Moisture Sensitivity Level: MSL 1 (Unlimited), making it suitable for various manufacturing environments.

LP2981A-30DBVTE4 Applications

The LP2981A-30DBVTE4 is ideal for a range of applications where a stable, low-power supply is required. Its compact SOT23-5 package and low dropout voltage make it particularly suitable for:

• Portable Devices: Ideal for battery-operated devices such as smartphones, tablets, and wearables, where space and power efficiency are critical.
• Embedded Systems: Suitable for embedded systems in industrial and automotive applications, providing a reliable power supply for microcontrollers and sensors.
• Consumer Electronics: Can be used in consumer electronics like digital cameras, MP3 players, and other portable gadgets.
• Medical Devices: Applicable in medical devices where precise voltage regulation and low power consumption are essential.

Conclusion of LP2981A-30DBVTE4

The LP2981A-30DBVTE4, despite its obsolete status, remains a valuable component in the Texas Instruments portfolio. Its combination of a fixed 3V output, low dropout voltage, and robust protection features make it a reliable choice for low-power applications. The enable control and low quiescent current further enhance its suitability for battery-operated devices and embedded systems. While newer alternatives may offer additional features, the LP2981A-30DBVTE4 continues to provide a cost-effective and dependable solution for stable power regulation in various electronic applications.