Texas Instruments

LM2671MX-ADJ

LM2671MX-ADJ Description

The LM2671MX-ADJ from Texas Instruments is an adjustable-output buck (step-down) switching voltage regulator designed for efficient power conversion in a compact footprint. Part of the SIMPLE SWITCHER® series, it delivers 500mA output current with a wide 6.5V to 40V input range, making it suitable for industrial, automotive, and consumer applications. The output voltage is adjustable from 1.21V to 37V, providing flexibility for diverse load requirements. Operating at a 260kHz switching frequency, it balances efficiency and component size, while its non-synchronous rectification topology simplifies design. The device is housed in an 8-SOIC package and is surface-mountable, ideal for space-constrained PCB layouts.

LM2671MX-ADJ Features

• Adjustable Output: Precision feedback enables custom voltage settings (1.21V–37V).
• Wide Input Range: Supports 6.5V–40V, accommodating fluctuating power sources.
• High Efficiency: Up to 90% efficiency with minimal external components.
• Integrated Protection: Includes thermal shutdown and current limiting.
• Low EMI: Fixed-frequency PWM reduces noise for sensitive applications.
• MSL1 Rated: Unlimited shelf life, suitable for extended storage.
• Obsolete Status: Still reliable for legacy designs but consider newer alternatives for future projects.

LM2671MX-ADJ Applications

• Industrial Systems: Power supplies for PLCs, sensors, and control modules.
• Automotive Electronics: Infotainment, lighting, and 12V/24V bus regulation.
• Consumer Devices: Portable gadgets, battery chargers, and LED drivers.
• Embedded Systems: Low-power MCU/FPGA rails in IoT devices.
• Telecom Equipment: Point-of-load (PoL) conversion in networking hardware.

Conclusion of LM2671MX-ADJ

The LM2671MX-ADJ excels in compact, efficient power conversion for medium-current applications, leveraging TI’s SIMPLE SWITCHER® architecture for ease of use. While obsolete, its robust performance in harsh environments (e.g., automotive) and flexibility in output tuning make it a viable choice for legacy or cost-sensitive designs. Engineers should evaluate newer alternatives like the LM267x series for enhanced features (e.g., synchronous rectification) in modern applications.

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