Texas Instruments

LM2678S-3.3  

DC Switching Voltage Regulators

LM2678S-3.3 Description

The LM2678S-3.3 is a high-performance, fixed output voltage regulator from Texas Instruments, designed to provide a stable 3.3V output at a maximum current of 5A. This buck converter is part of the SIMPLE SWITCHER® series, known for its ease of use and high efficiency. The LM2678S-3.3 operates over an input voltage range of 8V to 40V, making it suitable for a wide range of applications where input voltage variability is a concern. The device features a switching frequency of 260kHz, which helps in minimizing the size of external components while maintaining high efficiency.

The LM2678S-3.3 is housed in a surface-mount DDPAK package, which is ideal for compact designs and high thermal performance. The regulator is RoHS3 compliant and has a moisture sensitivity level (MSL) of 3, ensuring it is suitable for use in various environmental conditions. The device is currently in the "Last Time Buy" product status, indicating that it is a reliable choice for existing designs but may soon be phased out of production.

LM2678S-3.3 Features

• Fixed Output Voltage: The LM2678S-3.3 provides a stable 3.3V output, which is ideal for applications requiring a precise and consistent power supply.
• Wide Input Voltage Range: With an input voltage of range 8V to 40V, the regulator can handle a variety of input sources, making it versatile for different power supply scenarios.
• High Output Current: Capable of delivering up to 5A of output current, the LM2678S-3.3 is suitable for high-power applications.
• High Switching Frequency: The 260kHz switching frequency allows for the use of smaller inductors and capacitors, reducing the overall footprint of the power supply.
• Efficient Buck Topology: The buck converter topology ensures high efficiency, which is crucial for applications where power consumption and heat dissipation are critical.
• Surface-Mount Packaging: The DDPAK package provides excellent thermal performance and is suitable for surface-mount technology (SMT) processes.
• Compliance and Reliability: The LM2678S-3.3 is RoHS3 compliant and has a moisture sensitivity level of 3, ensuring it meets environmental and reliability standards.

LM2678S-3.3 Applications

The LM2678S-3.3 is ideal for a variety of applications that require a stable and efficient power supply. Some specific use cases include:

• Industrial Equipment: Powering control systems, sensors, and actuators that require a stable 3.3V supply.
• Telecommunications: Providing power to base stations, routers, and other networking equipment.
• Automotive Electronics: Suitable for in-vehicle systems where a wide input voltage range and high current output are necessary.
• Consumer Electronics: Ideal for devices such as gaming consoles, smart TVs, and other high-power consumer products.
• Medical Devices: Powering diagnostic equipment, monitoring devices, and other medical instruments that require precise voltage regulation.

Conclusion of LM2678S-3.3

The LM2678S-3.3 from Texas Instruments is a robust and efficient fixed-output voltage regulator designed to meet the demands of high-power applications. Its wide input voltage range, high output current, and high switching frequency make it a versatile and reliable choice for various industries. The surface-mount packaging and compliance with environmental standards further enhance its suitability for modern electronic designs. While the product is currently in the "Last Time Buy" status, it remains an excellent option for existing designs requiring a stable and efficient 3.3V power supply.

LM2678S-3.3 Documents

Download datasheets and manufacturer documentation for LM2678S-3.3

PCN Assembly/Origin :

LMDMOS devices 23/Mar/2018      

Datasheets :

LM2678      

Design Resources :

LM2678 Design with WEBENCH® Power Designer      

PCN Obsolescence/ EOL :

EOL 12/Sept/2023      

HTML Datasheet :

LM2678