Texas Instruments

LM2678S-12/NOPB  

DC Switching Voltage Regulators

LM2678S-12/NOPB Description

The LM2678S-12/NOPB is a high-efficiency, 5A step-down (buck) DC-DC switching voltage regulator from Texas Instruments' SIMPLE SWITCHER® series. Designed for fixed 12V output, it operates over a wide 15V to 40V input range, making it suitable for industrial, automotive, and telecom applications requiring robust power conversion. With a switching frequency of 260kHz, it balances efficiency and component size, reducing the need for large external filters. The device is housed in a surface-mount DDPAK package, ensuring thermal performance and reliability in demanding environments.

LM2678S-12/NOPB Features

• High Efficiency (Up to 92%): Minimizes power loss and heat dissipation.
• Wide Input Range (15V–40V): Supports varied power sources, including 24V industrial systems.
• 5A Continuous Output Current: Delivers stable power for high-load applications.
• Fixed 12V Output: Eliminates external feedback resistors, simplifying design.
• Non-Synchronous Rectification: Cost-effective for applications not requiring ultra-high efficiency.
• 260kHz Switching Frequency: Reduces inductor size while maintaining low EMI.
• Robust Protection: Includes thermal shutdown and current limiting.
• RoHS3 & REACH Compliant: Meets environmental and safety standards.

LM2678S-12/NOPB Applications

• Industrial Power Supplies: For PLCs, motor controllers, and automation systems.
• Automotive Electronics: DC-DC conversion in infotainment and ADAS.
• Telecom Infrastructure: Powering base stations and networking equipment.
• Distributed Power Systems: Intermediate bus converters in server/FPGA applications.
• LED Lighting Drivers: High-current LED arrays requiring stable voltage.

Conclusion of LM2678S-12/NOPB

The LM2678S-12/NOPB stands out for its simplicity, efficiency, and ruggedness, offering a reliable solution for 12V, 5A power conversion. Its wide input range and integrated protections make it ideal for harsh environments, while the fixed output reduces BOM complexity. Compared to similar models, it excels in cost-sensitive, high-reliability applications where thermal performance and ease of design are critical. A versatile choice for engineers seeking a balance of performance and practicality.

LM2678S-12/NOPB Documents

Download datasheets and manufacturer documentation for LM2678S-12/NOPB

PCN Assembly/Origin :

LMDMOS devices 23/Mar/2018      

Datasheets :

LM2678      

Design Resources :

LM2678 Design with WEBENCH® Power Designer      

HTML Datasheet :

LM2678