Using the L5973D- I have followed the Schematic as the datasheet instructs, but I have tried two different inductors. I have found problems with other systems on the board with the one inductor (744 561 15), such as Microchip while running in debug mode. The Schottky Diode (D1) used is the STPS340-SMB instead of the STPS2L25.
The requirements of the inductor are 15uH and 3A. So the first inductor selected was the DO3316P-153 (as recommended by the L5973D datasheet). The frequency out of the L5973D at pin one (circled in red on the schematic) is given in the figure below:
When the inductor is replaced with the more affordable inductor (744 561 15), the frequency at pin one is given in the figure below:
With the 744 561 15, there is this added ripple before the square wave, can anyone explain what is happening here?
Is the older inductor (DO3316P-153) filtering or is the new inductor(744 561 15) adding in a delay?
After running the Board for more than an hour and the system keeps resetting itself. At this point, I am not sure what is going on, any suggestions?