Texas Instruments

LM2678S-3.3/NOPB  

DC Switching Voltage Regulators

LM2678S-3.3/NOPB Description

The LM2678S-3.3/NOPB from Texas Instruments is a high-efficiency, fixed-output 3.3V, 5A buck (step-down) switching voltage regulator, part of the SIMPLE SWITCHER® series. Designed for surface-mount applications, it operates over a wide 8V to 40V input range, making it suitable for industrial, automotive, and telecom systems requiring robust power conversion. With a 260kHz switching frequency, it balances efficiency and component size, reducing external filter requirements. The device is ROHS3 compliant and packaged in a DDPAK (TO-263) tube, ensuring reliability in harsh environments.

LM2678S-3.3/NOPB Features

• Fixed 3.3V Output: Precision-regulated voltage for stable power delivery.
• High Current Capacity: Supports 5A continuous output current with minimal dropout.
• Wide Input Range (8V–40V): Ideal for applications with fluctuating input voltages (e.g., automotive or battery-powered systems).
• 260kHz Switching Frequency: Optimizes efficiency while minimizing external inductor/capacitor size.
• Non-Synchronous Rectification: Simplifies design while maintaining >90% efficiency.
• Robust Packaging: DDPAK-7 offers superior thermal performance for high-power applications.
• Compliance: ROHS3, REACH unaffected, and MSL3 (168 hours) rated for extended shelf life.

LM2678S-3.3/NOPB Applications

• Industrial Power Supplies: For PLCs, motor controllers, and automation systems requiring stable 3.3V rails.
• Automotive Electronics: Supports infotainment, ADAS, and ECUs with wide input tolerance.
• Telecom/Networking Equipment: Powers FPGAs, ASICs, and routers in 12V/24V distributed power architectures.
• Battery-Powered Systems: Efficiently steps down higher voltages (e.g., 24V Li-ion) to 3.3V for IoT devices.
• Embedded Systems: Ideal for single-board computers and microcontroller power management.

Conclusion of LM2678S-3.3/NOPB

The LM2678S-3.3/NOPB stands out for its high current capability, wide input range, and compact design, making it a versatile choice for demanding power applications. Its non-synchronous topology simplifies implementation, while TI’s SIMPLE SWITCHER® technology ensures reliability. Whether in automotive, industrial, or telecom systems, this regulator delivers efficient, stable power with minimal external components, reducing both cost and board space.

LM2678S-3.3/NOPB Documents

Download datasheets and manufacturer documentation for LM2678S-3.3/NOPB

PCN Assembly/Origin :

LMDMOS devices 23/Mar/2018      

Datasheets :

LM2678      

Design Resources :

LM2678 Design with WEBENCH® Power Designer      

HTML Datasheet :

LM2678