Texas Instruments

LP3856ET-3.3  

Linear & Switching Voltage Regulators

LP3856ET-3.3 Description

The LP3856ET-3.3 is a linear regulator designed by Texas Instruments, featuring a fixed output voltage of 3.3V and capable of delivering a maximum output current of 3A. This regulator is housed in a Through Hole TO220-5 package, making it suitable for applications requiring robust and reliable power management solutions. With a maximum input voltage of 7V, the LP3856ET-3.3 ensures efficient power conversion and minimal dropout voltage, which is a maximum of 0.6V at 3A. This low dropout voltage is a significant advantage, especially in applications where the input voltage is close to the output voltage, ensuring high efficiency and reduced power dissipation.

LP3856ET-3.3 Features

• Fixed Output Voltage: The LP3856ET-3.3 provides a stable 3.3V output, which is ideal for powering various electronic devices and systems that require a consistent voltage supply.
• High Output Current: Capable of delivering up to 3A, this regulator is well-suited for applications that demand high current, ensuring reliable operation even under heavy load conditions.
• Low Dropout Voltage: With a maximum dropout voltage of 0.6V at 3A, the LP3856ET-3.3 offers superior performance compared to other linear regulators, making it highly efficient in low headroom applications.
• Enable Control Feature: The enable pin allows for easy control of the regulator's operation, providing flexibility in managing power consumption and system performance.
• Protection Features: Over current, over temperature, and short circuit protections ensure the longevity and reliability of the regulator, safeguarding it against potential damage from abnormal operating conditions.
• Low Quiescent Current: The regulator operates with a quiescent current of only 4mA, contributing to its overall efficiency and making it suitable for low-power applications.
• High PSRR: The LP3856ET-3.3 offers a high power supply rejection ratio (PSRR) ranging from 73dB to 57dB at 120Hz, effectively filtering out noise and ripple from the input supply, resulting in a clean and stable output voltage.

LP3856ET-3.3 Applications

The LP3856ET-3.3 is ideal for a wide range of applications, including:

• Embedded Systems: Provides a stable power supply for microcontrollers, sensors, and other components in embedded systems.
• Consumer Electronics: Suitable for powering devices such as smartphones, tablets, and other portable electronics that require a reliable and efficient power source.
• Industrial Equipment: Ideal for industrial applications where robustness and reliability are critical, such as in PLCs, motor controllers, and other industrial automation equipment.
• Telecommunications: Can be used in base stations, routers, and other telecom equipment that require a stable and efficient power supply.
• Automotive Electronics: Suitable for automotive applications, including infotainment systems, electronic control units, and other automotive electronics that demand high reliability and efficiency.

Conclusion of LP3856ET-3.3

The LP3856ET-3.3 from Texas Instruments is a versatile and efficient linear regulator that offers a fixed 3.3V output and a maximum output current of 3A. Its low dropout voltage, high PSRR, and various protection features make it a reliable choice for a wide range of applications. Despite being marked as obsolete, the LP3856ET-3.3 remains a valuable component for designers and engineers seeking a robust power management solution. Its Through Hole TO220-5 package ensures easy integration into existing systems, making it a practical choice for both new designs and retrofit applications.

LP3856ET-3.3 Documents

Download datasheets and manufacturer documentation for LP3856ET-3.3

Datasheets :

LP3853, LP3856