Texas Instruments

LP3984IMF-1.8

LP3984IMF-1.8 Description

The LP3984IMF-1.8 is a fixed-output linear regulator designed by Texas Instruments, offering a robust and efficient solution for power management applications. This regulator is part of the LP3984 family and is specifically configured to provide a stable 1.8V output voltage with a maximum output current of 150mA. The device is designed for surface-mount applications and comes in a compact SOT23-5 package, making it ideal for space-constrained designs. Despite its small form factor, the LP3984IMF-1.8 delivers high performance with a maximum input voltage of 6V and a low dropout voltage of 0.12V at 150mA, ensuring efficient power conversion even at low input-to-output voltage differentials.

LP3984IMF-1.8 Features

Technical Specifications:

• Output Type: Fixed
• Voltage - Input (Max): 6V
• Current - Output: 150mA
• Voltage - Output (Min/Fixed): 1.8V
• Voltage Dropout (Max): 0.12V @ 150mA
• Current - Supply (Max): 150 µA
• Current - Quiescent (Iq): 125 µA
• PSRR: 60dB ~ 40dB (1kHz ~ 10kHz)
• Control Features: Enable
• Protection Features: Over Temperature, Short Circuit
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• Mounting Type: Surface Mount
• Package: Tape & Reel (TR)

Performance Benefits:

• Low Dropout Voltage: The LP3984IMF-1.8's low dropout voltage of 0.12V at 150mA ensures high efficiency, making it suitable for battery-powered applications where the input voltage can drop close to the output voltage.
• Low Quiescent Current: With a quiescent current of only 125 µA, the regulator minimizes power consumption in standby mode, extending battery life.
• High PSRR: The regulator offers a high power supply rejection ratio (PSRR) of 60dB at 1kHz and 40dB at 10kHz, providing excellent noise suppression and stable output voltage.
• Enable Control Feature: The enable control feature allows for dynamic control of the regulator's operation, enabling power-saving modes and efficient power management.
• Protection Features: Built-in over-temperature and short-circuit protection ensure reliable operation and protect the device from damage in adverse conditions.

LP3984IMF-1.8 Applications

The LP3984IMF-1.8 is well-suited for a variety of applications that require a stable and efficient power supply. Its compact size and high performance make it ideal for:

• Portable Devices: Such as smartphones, tablets, and wearable devices where space and power efficiency are critical.
• Battery-Powered Systems: The low dropout voltage and low quiescent current make it an excellent choice for applications where battery life is a key consideration.
• Consumer Electronics: Including digital cameras, MP3 players, and other portable electronics that demand reliable power management.
• Industrial Applications: Where a compact, efficient, and reliable power supply is required for sensors, actuators, and other low-power devices.

Conclusion of LP3984IMF-1.8

The LP3984IMF-1.8 from Texas Instruments is a versatile and efficient linear regulator that offers a fixed 1.8V output with a maximum current of 150mA. Its low dropout voltage, low quiescent current, and high PSRR make it an excellent choice for a wide range of applications, particularly those requiring high efficiency and reliable power management. The inclusion of enable control and robust protection features further enhances its performance and reliability. Despite being marked as obsolete, the LP3984IMF-1.8 remains a valuable component for designers seeking a compact, high-performance power management solution.