In summary, the Amgis LM2595 provides active functions for a step-down (or buck) switching regulator, operates at a switching frequency of 150KHz, and is capable of driving a 1A load. To select the correct inductor value, simply consult the appropriate inductor selection graph for the fixed output options of 3.3V, 5.0V, or 12V.  For all other voltages, use the adjustable version selection process.