Texas Instruments

LP3873ESX-1.8

LP3873ESX-1.8 Description

The LP3873ESX-1.8 is a fixed-output linear voltage regulator designed by Texas Instruments, offering a robust and reliable solution for applications requiring a stable 1.8V output at up to 3A. This regulator is housed in a surface-mount DDPAK/TO263-5 package, making it suitable for compact and high-density PCB designs. Despite being marked as obsolete, the LP3873ESX-1.8 remains a viable option for legacy systems and specific applications where its unique features and performance characteristics are advantageous.

LP3873ESX-1.8 Features

• Output Type: Fixed at 1.8V, ensuring a stable and consistent power supply.
• Input Voltage Range: Capable of handling input voltages up to 7V, providing flexibility in power source selection.
• Output Current: Delivers a maximum output current of 3A, suitable for demanding applications.
• Single Regulator: Simplifies design with a single regulator, reducing complexity and component count.
• Positive Output Configuration: Ideal for applications requiring a positive voltage supply.
• Low Dropout Voltage: With a maximum dropout voltage of 1.2V at 3A, the LP3873ESX-1.8 maintains high efficiency even under heavy load conditions.
• Enable Control Feature: Allows for dynamic control of the regulator, enabling power-saving modes and precise power management.
• Protection Features: Over current, over temperature, and short circuit protection ensure robustness and reliability in various operating conditions.
• Low Quiescent Current: At 9 mA, the regulator minimizes power consumption during idle states.
• High PSRR: Ranging from 73dB to 57dB at 120Hz, the LP3873ESX-1.8 effectively filters out noise from the input supply, ensuring clean output voltage.
• Moisture Sensitivity Level: MSL 3 (168 Hours) ensures the component remains stable and functional in humid environments.
• Mounting Type: Surface mount design facilitates easy integration into modern PCB layouts.

LP3873ESX-1.8 Applications

The LP3873ESX-1.8 is well-suited for a variety of applications where a stable and efficient power supply is critical. Its fixed 1.8V output and 3A current capability make it ideal for:

• Embedded Systems: Providing a reliable power source for microcontrollers, sensors, and other low-voltage components.
• Telecommunications: Ensuring stable power delivery in base stations, routers, and other communication equipment.
• Industrial Controls: Powering PLCs, motor controllers, and other industrial automation components.
• Consumer Electronics: Suitable for powering devices such as smartphones, tablets, and other portable electronics.
• Medical Devices: Ensuring reliable power supply in critical medical equipment where stability and precision are paramount.

Conclusion of LP3873ESX-1.8

The LP3873ESX-1.8 from Texas Instruments is a versatile and reliable linear voltage regulator, offering a fixed 1.8V output with a maximum current of 3A. Its low dropout voltage, high PSRR, and comprehensive protection features make it an excellent choice for applications requiring stable and efficient power delivery. Despite its obsolete status, the LP3873ESX-1.8 remains a valuable component for legacy systems and specific applications where its unique characteristics provide a distinct advantage. Its surface-mount package and enable control feature further enhance its suitability for modern electronic designs.