Step-Down Voltage Regulator Texas Instruments LM2672M-5.0/NOPB — Fixed 5.0 V Output, Input 6.5–40 V, SO-8

The Texas Instruments LM2672M-5.0 is a fixed 5.0 V step-down (buck) switching regulator in an SO-8 package, engineered for applications requiring a compact, efficient regulated 5 V supply. It accepts input voltages from 6.5 V to 40 V and is intended to power digital and analog circuits in embedded systems, industrial controls, automotive electronics, and similar devices. The device integrates switching control circuitry suitable for point-of-load conversion where space and thermal performance are constrained.

Advantages

The LM2672M-5.0 provides a stable 5 V output across a wide input range, enabling use with varied power sources. Its switching topology delivers higher efficiency than linear regulators for moderate load currents, reducing power dissipation and heat generation. The SO-8 package offers a compact footprint for PCB space saving while maintaining adequate thermal paths for typical surface-mount assembly. The fixed output simplifies design by eliminating the need for feedback divider components.

Suitable for

• Embedded systems and development boards requiring a single 5 V rail
• Industrial control modules with wide input voltage sources
• Automotive electronics powered from vehicle battery systems or transient-prone supplies
• Power supplies for microcontrollers, sensors, and interface circuitry

Key specifications

• Output voltage: fixed 5.0 V
• Input voltage range: 6.5 V to 40 V
• Package type: SO-8 surface-mount package
• Topology: step-down (buck) switching regulator
• Intended usage: regulated point-of-load conversion for digital and analog circuits

How to use

Place the regulator on the PCB following the manufacturer’s recommended SO-8 footprint and ensure correct orientation. Provide input and output decoupling capacitors close to the device pins and follow layout guidance for the switching node and ground return to minimize EMI and voltage drops. Select the inductor and output capacitor values per the regulator’s application recommendations to ensure stable regulation under expected load conditions. Observe thermal considerations: ensure sufficient copper area or thermal vias to dissipate heat at higher load currents.

Usage recommendations

For reliable operation, verify input source transient behavior and include adequate input filtering or transient suppression when used in noisy or automotive environments. Test the regulator on your actual PCB layout and under representative loads to confirm stability, efficiency, and thermal performance before finalizing the design.