LM2674MX-5.0/NOPB

• Fixed 5V Output at Up to 500mA Output Current
• 8V to 40V Input Voltage range, 40V Maximum Supply
• 260k Hz Switching frequency, 95% Maximum Duty Cycle
• 90% Quoted efficiency, Buck (step-down) Topology
• 8-Pin SOIC Surface-Mount package, MSL 1
• -40°C to 125°C Operating temperature, Halogen Free and RoHS Compliant

The LM2674MX-5.0/NOPB is a step-down (buck) DC-DC switching regulator from Texas Instruments in an 8-pin SOIC package. It accepts an 8V to 40V input and delivers a fixed 5V output at up to 500mA, switching at 260k Hz with efficiency quoted at 90%. The LM2674MX-5.0/NOPB is a non-synchronous buck topology, so it requires an external catch diode. Texas Instruments lists it as an active production part.

The LM2674MX-5.0/NOPB is used to generate a regulated 5V rail from a higher unregulated bus — 12V and 24V industrial supplies, automotive-adjacent 12V systems and 24V sensor loops all sit inside its 8V to 40V input window. Because the output is fixed, it is chosen for simple point-of-load rails where no feedback divider is wanted: powering microcontrollers, logic, sensors and small relays. The 95% maximum duty cycle allows it to hold regulation as the input droops toward the output voltage. Purchasers are typically industrial equipment OEMs and contract manufacturers sourcing established buck regulators for long-life designs.