Texas Instruments

LP3874EMPX-3.3

LP3874EMPX-3.3 Description

The LP3874EMPX-3.3 is a linear regulator designed by Texas Instruments, offering a fixed output voltage of 3.3V and a maximum output current of 800mA. This device is housed in a Surface Mount SOT223-5 package, making it suitable for compact and efficient power management solutions. The regulator is designed to operate with an input voltage range up to 7V, ensuring compatibility with a variety of power sources. The LP3874EMPX-3.3 features a low dropout voltage of 0.35V at 800mA, which enhances its efficiency and performance in low-voltage applications. Additionally, it includes an enable control feature, allowing for dynamic power management and system optimization.

LP3874EMPX-3.3 Features

• Fixed Output Voltage: 3.3V, providing a stable and reliable power supply for sensitive electronic components.
• High Output Current: Capable of delivering up to 800mA, making it suitable for applications requiring moderate to high current loads.
• Low Dropout Voltage: A maximum dropout voltage of 0.35V at 800mA ensures high efficiency, especially in low-voltage scenarios.
• Enable Control Feature: Allows for dynamic control of the regulator, enabling power-saving modes and system optimization.
• Protection Features: Over-current, over-temperature, and short-circuit protection ensure robustness and reliability in various operating conditions.
• Low Quiescent Current: 9mA, contributing to overall system efficiency and reduced power consumption.
• High PSRR: 73dB to 57dB at 120Hz, ensuring excellent noise rejection and stable output voltage.
• Surface Mount Package: SOT223-5 package type facilitates easy integration into PCB designs and supports automated assembly processes.
• Moisture Sensitivity Level: MSL 1 (Unlimited), ensuring the device is suitable for a wide range of manufacturing environments.

LP3874EMPX-3.3 Applications

The LP3874EMPX-3.3 is ideal for a variety of applications where a stable and efficient power supply is required. Its fixed 3.3V output and high current capability make it suitable for powering microcontrollers, digital signal processors (DSPs), and other digital circuits. The low dropout voltage and high PSRR ensure that it can maintain stable performance even under varying input conditions, making it suitable for battery-powered devices and portable electronics. The enable control feature allows for dynamic power management, which is beneficial in applications requiring low power consumption during standby or sleep modes. Additionally, the robust protection features make it reliable for use in industrial and automotive applications where harsh operating conditions are common.

Conclusion of LP3874EMPX-3.3

The LP3874EMPX-3.3 from Texas Instruments is a versatile and efficient linear regulator designed to meet the demands of modern electronic systems. Its fixed 3.3V output, high current capability, and low dropout voltage make it an excellent choice for a wide range of applications, from portable devices to industrial equipment. The inclusion of enable control and comprehensive protection features further enhances its reliability and flexibility. Despite being marked as obsolete, the LP3874EMPX-3.3 remains a valuable component for engineers seeking a reliable and efficient power management solution.