For years, the LM2596 has been the workhorse of the DIY and professional electronics world. This simple buck converter (step-down voltage regulator) is beloved for its ability to efficiently drop higher voltages (up to 40V) to lower ones (e.g., 12V to 5V or 3.3V) without the heat of a linear regulator like the 7805.

| Parameter | Simulation Range | Notes | | :--- | :--- | :--- | | | 4.5V to 40V | Simulation fails below ~4.5V (UVLO). | | Output Current | 0A to 3A | Thermal modeling active; performance degrades above 3A. | | Operating Temp | -40°C to +125°C | Junction temperature is now a probeable variable. | | Switching Freq | 150 kHz (Fixed) | Models internal oscillator jitter. |