Texas Instruments

LP5951MFX-1.8

LP5951MFX-1.8 Description

The LP5951MFX-1.8 is a fixed-output linear regulator designed by Texas Instruments, offering a regulated 1.8V output voltage with a maximum output current of 150mA. This device is housed in a compact SOT23-5 package, making it suitable for surface-mount applications. It features a maximum input voltage of 5.5V and a dropout voltage of only 0.35V at 150mA, ensuring efficient operation even at low input-to-output voltage differentials. The regulator boasts a low quiescent current of 55 µA and a maximum supply current of 70 µA, making it ideal for battery-powered and low-power consumption applications.

LP5951MFX-1.8 Features

• Output Type: Fixed 1.8V output voltage.
• Input Voltage Range: Up to 5.5V.
• Output Current: 150mA maximum.
• Low Dropout Voltage: 0.35V at 150mA, enhancing efficiency in low-voltage applications.
• Low Quiescent Current: 55 µA, minimizing power consumption in standby mode.
• Enable Control: Provides flexibility in system power management.
• Protection Features: Over-current, over-temperature, and short-circuit protection ensure robustness and reliability.
• Power Supply Rejection Ratio (PSRR): 60dB at 100Hz to 50dB at 10kHz, ensuring stable output voltage under varying input conditions.
• Moisture Sensitivity Level (MSL): Level 1 (Unlimited), suitable for various manufacturing environments.
• Package Type: Tape & Reel (TR), facilitating automated assembly processes.

LP5951MFX-1.8 Applications

The LP5951MFX-1.8 is well-suited for a variety of applications requiring a stable 1.8V supply with low power consumption. Its compact size and low dropout voltage make it ideal for:

• Battery-Powered Devices: Such as portable electronics, where efficient power management is crucial.
• Low-Power Systems: Including IoT devices, wearables, and other applications where minimal power draw is essential.
• Embedded Systems: Where a reliable and efficient power supply is needed to support critical components.
• Telecommunications: For powering low-voltage circuits in communication modules and base stations.

Conclusion of LP5951MFX-1.8

The LP5951MFX-1.8 from Texas Instruments is a versatile and efficient linear regulator designed for applications requiring a stable 1.8V output. Its low dropout voltage, low quiescent current, and comprehensive protection features make it a reliable choice for low-power, battery-operated devices. Despite its obsolete status, the LP5951MFX-1.8 remains a valuable component for designers seeking a compact, efficient, and robust power management solution.