Texas Instruments

LP3855EMPX-ADJ

LP3855EMPX-ADJ Description

The LP3855EMPX-ADJ is a high-performance linear voltage regulator designed by Texas Instruments. This device is part of the Linear & Switching Voltage Regulators category and is known for its adjustable output voltage, making it suitable for a wide range of applications. The LP3855EMPX-ADJ features a maximum input voltage of 7V and can deliver a continuous output current of up to 1.5A. It operates with a minimum output voltage of 1.23V and a maximum output voltage of 6.6V, providing flexibility in voltage regulation.

The regulator is designed with a dropout voltage of 0.435V at a load current of 1.5A, ensuring efficient operation even at low input-to-output voltage differentials. This feature is particularly beneficial in applications where the input voltage may be close to the required output voltage. The LP3855EMPX-ADJ also boasts a low quiescent current of 3 mA, which is crucial for maintaining high efficiency in low-power applications.

LP3855EMPX-ADJ Features

• Adjustable Output Voltage: The LP3855EMPX-ADJ offers an adjustable output voltage range from 1.23V to 6.6V, providing flexibility to meet various application requirements.
• High Output Current: Capable of delivering up to 1.5A of output current, this regulator is suitable for applications requiring high current loads.
• Low Dropout Voltage: With a maximum dropout voltage of 0.435V at 1.5A, the LP3855EMPX-ADJ ensures efficient operation even with small input-to-output voltage differences.
• Low Quiescent Current: The regulator features a low quiescent current of 3 mA, which is ideal for battery-operated and low-power applications.
• Enable Control Feature: The enable feature allows for easy control of the regulator's operation, enabling power savings and dynamic power management.
• Protection Features: The LP3855EMPX-ADJ includes over-current, over-temperature, and short-circuit protection, ensuring reliable operation and protection against common fault conditions.
• High PSRR: The regulator has a high power supply rejection ratio (PSRR) ranging from 73dB to 57dB at 120Hz, which helps in filtering out noise from the input supply.
• Surface Mount Package: The SOT223-5 package is suitable for surface mount technology, making it ideal for compact and high-density PCB designs.

LP3855EMPX-ADJ Applications

The LP3855EMPX-ADJ is well-suited for a variety of applications due to its adjustable output voltage, high output current, and low dropout voltage. Some specific use cases include:

• Consumer Electronics: Ideal for portable devices, smartphones, and tablets where high efficiency and low power consumption are critical.
• Industrial Equipment: Suitable for industrial control systems, sensors, and actuators that require stable and adjustable voltage regulation.
• Telecommunications: Can be used in base stations, routers, and other telecom equipment where reliable power supply is essential.
• Automotive Applications: Applicable in automotive electronics for powering various modules and systems that demand high current and efficient voltage regulation.

Conclusion of LP3855EMPX-ADJ

The LP3855EMPX-ADJ from Texas Instruments is a versatile and efficient linear voltage regulator that offers adjustable output voltage, high output current, and low dropout voltage. Its low quiescent current and high PSRR make it suitable for a wide range of applications, from consumer electronics to industrial and automotive systems. Despite being marked as obsolete, the LP3855EMPX-ADJ remains a reliable choice for applications requiring high performance and robust protection features.