Texas Instruments

LM2676SX-5.0

LM2676SX-5.0 Description

The LM2676SX-5.0 from Texas Instruments is a fixed 5V output, 3A step-down (buck) switching voltage regulator designed for high-efficiency power conversion. Part of the SIMPLE SWITCHER® series, it integrates a 260kHz oscillator, N-channel MOSFET, and control circuitry into a compact surface-mount DDPAK package. With an input voltage range of 8V to 40V, it is optimized for applications requiring robust performance in industrial, automotive, and embedded systems. The device is RoHS3 compliant and REACH unaffected, ensuring environmental compliance.

LM2676SX-5.0 Features

• Fixed 5V Output: Precision-regulated output with ±2% tolerance.
• High Efficiency (Up to 95%): Minimizes heat dissipation and power loss.
• Wide Input Range (8V–40V): Suitable for 12V/24V automotive and industrial systems.
• 3A Continuous Output Current: Supports high-power loads without external FETs.
• 260kHz Switching Frequency: Balances efficiency and component size.
• Non-Synchronous Rectification: Simplified design with external Schottky diode.
• Protection Features: Includes thermal shutdown, current limiting, and under-voltage lockout.
• MSL3 (168 Hours): Suitable for extended storage in humid environments.

LM2676SX-5.0 Applications

• Automotive Systems: Powering infotainment, sensors, and ECUs from 12V/24V batteries.
• Industrial Equipment: Voltage regulation for PLCs, motor drives, and test instruments.
• Embedded Computing: Point-of-load (PoL) conversion for 5V logic and peripherals.
• Telecom Infrastructure: Efficient power delivery in base stations and routers.
• Consumer Electronics: Used in set-top boxes, displays, and portable devices.

Conclusion of LM2676SX-5.0

The LM2676SX-5.0 excels in high-current, wide-input applications with its compact design, high efficiency, and robust protection. Its fixed 5V output simplifies designs, while the SIMPLE SWITCHER® architecture reduces external component count. Ideal for automotive, industrial, and embedded systems, this regulator combines reliability with performance, though its non-synchronous topology may require careful diode selection. As a last-time-buy product, engineers should evaluate alternatives for future designs.