Texas Instruments

LP3855EMP-3.3  

Linear & Switching Voltage Regulators

LP3855EMP-3.3 Description

The LP3855EMP-3.3 is a linear voltage regulator designed by Texas Instruments, offering a fixed output voltage of 3.3V and capable of delivering up to 1.5A of output current. This regulator is housed in a surface-mount SOT223-5 package, making it suitable for compact and high-density PCB designs. The device features a maximum input voltage of 7V and a dropout voltage of 0.44V at full load, ensuring efficient operation even at low input-to-output voltage differentials.

LP3855EMP-3.3 Features

• Output Type: Fixed, providing a stable 3.3V output.
• Input Voltage Range: Up to 7V, allowing for a wide range of input sources.
• Output Current: Capable of delivering up to 1.5A, making it suitable for applications requiring moderate to high current.
• Dropout Voltage: Low dropout voltage of 0.44V at 1.5A, ensuring high efficiency and minimal power loss.
• Quiescent Current: Low quiescent current of 3mA, contributing to overall power efficiency.
• Power Supply Current: Maximum supply current of 10mA, minimizing power consumption.
• Control Features: Includes an enable function, allowing for dynamic control of the regulator's operation.
• Protection Features: Over-current, over-temperature, and short-circuit protection ensure robustness and reliability in various operating conditions.
• PSRR: High power supply rejection ratio (PSRR) ranging from 73dB to 57dB at 120Hz, providing excellent noise filtering capabilities.
• Moisture Sensitivity Level: MSL 1 (Unlimited), suitable for a wide range of manufacturing environments.
• Package: Tape & Reel (TR) packaging, facilitating automated assembly processes.

LP3855EMP-3.3 Applications

The LP3855EMP-3.3 is ideal for a variety of applications where a stable and efficient power supply is required. Its low dropout voltage and high PSRR make it particularly suitable for battery-powered devices and systems where input voltage fluctuations are common. Specific use cases include:

• Consumer Electronics: Portable devices, smartphones, and tablets that require a stable 3.3V supply.
• Industrial Equipment: Control systems, sensors, and actuators that need reliable power regulation.
• Telecommunications: Base stations, routers, and other networking equipment where low noise and high efficiency are critical.
• Automotive Electronics: In-vehicle infotainment systems, ECUs, and other automotive applications where space is limited and reliability is paramount.

Conclusion of LP3855EMP-3.3

The LP3855EMP-3.3 from Texas Instruments is a robust and efficient linear voltage regulator designed for applications requiring a fixed 3.3V output and up to 1.5A of current. Its low dropout voltage, high PSRR, and comprehensive protection features make it a reliable choice for a wide range of applications. Despite its obsolete status, the LP3855EMP-3.3 remains a valuable component for engineers and designers seeking a compact, high-performance regulator.

LP3855EMP-3.3 Documents

Download datasheets and manufacturer documentation for LP3855EMP-3.3

Datasheets :

LP3852, LP3855      

HTML Datasheet :

LP3852, LP3855