Texas Instruments

LM2673S-3.3/NOPB

LM2673S-3.3/NOPB Description

The LM2673S-3.3/NOPB from Texas Instruments is a high-efficiency, fixed-output 3.3V, 3A buck (step-down) switching voltage regulator designed for demanding power management applications. Part of the SIMPLE SWITCHER® series, it integrates a 260kHz oscillator, enabling compact designs with minimal external components. The device operates over a wide 8V to 40V input range, making it suitable for industrial, automotive, and telecom systems where input voltage fluctuations are common. Housed in a surface-mount DDPAK package, it offers robust thermal performance and is RoHS3 compliant and REACH unaffected, meeting stringent environmental standards.

LM2673S-3.3/NOPB Features

• Fixed 3.3V Output: Eliminates the need for external feedback resistors, simplifying design.
• High Efficiency (Up to 95%): Reduces power dissipation and heat generation.
• Wide Input Range (8V–40V): Supports diverse power sources, including 12V/24V automotive or industrial rails.
• 3A Continuous Output Current: Delivers stable power for high-load applications.
• 260kHz Switching Frequency: Balances efficiency and component size, minimizing EMI.
• Non-Synchronous Rectification: Lowers cost while maintaining performance.
• Built-in Protection: Includes thermal shutdown and current limiting for reliability.
• MSL3 (168 Hours): Suitable for extended storage in humid environments.

LM2673S-3.3/NOPB Applications

• Industrial Automation: Powering PLCs, sensors, and motor controllers.
• Automotive Systems: Voltage regulation for infotainment, ADAS, and lighting.
• Telecom Infrastructure: Base stations and networking equipment requiring stable 3.3V rails.
• Consumer Electronics: Set-top boxes, routers, and portable devices.
• Embedded Systems: Microcontroller and FPGA power supplies.

Conclusion of LM2673S-3.3/NOPB

The LM2673S-3.3/NOPB stands out for its robust design, high efficiency, and ease of integration, making it ideal for applications requiring reliable 3.3V power from variable inputs. Its wide operating range, compact footprint, and compliance with environmental standards position it as a superior choice over discrete solutions or less versatile regulators. Engineers can leverage its simplicity and performance to reduce development time and BOM costs in power-sensitive designs.