Saturation current rating of Inductor used to set-up the built-in switching regulator

Question: Why is the saturation current rating of Inductor used to set-up the built-in switching regulator for PowerPSoC devices equal 1.5A?

 

Answer:

When using the 32V input, the peak inrush current can be as high as 1.1A. The inductor should not saturate when the regulator is starting up. If it saturates, it acts as just a very small resistance and could damage the circuit. Please note that the inductance of the inductor should not drop at 1.1A.

Please refer CY3267 BOM at www.cypress.com/?rID=36571 to check the inductor to use for built-in switching regulator.

You can also refer to Switching Regulator section of the TRM at www.cypress.com/?rID=35366 for more information on the built-in switching regulator for PowerPSoC devices.