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For simplification I just used a 20uF capacitor (connected 2 10uF in parallel),
Output Capacitors:
The effective capacitance can be calculated as follows,
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To compensate the DC-bias and looking at the capacitors the WARG library already have, I selected 2 10uF capacitors with equivalent capacitance around 4.24uF at 5V DC and connect them in parallel.
Resistors
For the ILIM pin, a resistor is needed to set the current limit, according to the graph in the data sheet, to get a current limit of 6A we need 60.4kOhm resistor
For the FB pin, we need to build a voltage divider network to set the output voltage from the feedback voltage.
I have already set V_FB=0.5V by connecting VSEL_1 and VSEL_2 to VCC
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System Block Diagram
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Reverse Polarity Protection
One feature of the buck converter that is nice to have is RPP. It can be implemented using the following methods:
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Overall, choosing a P-MOSFET and an IC are equally favorable, for the sake of learning I have chosen to use IC.
RPP IC selection:
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RPP diagram:
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