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While the source device should do most of the voltage regulation, TI recommends a transient - voltage suppressing diode be implemented on the VBUS_IN rail. This is due to the possibility of a voltage surge when a cable with current actively running through it is unplugged, causing inductive ringing (as mentioned here), as well as any electrostatic discharge events. The For example, the TVS2200 product is recommended for a 20V spec, and is what we will select for our application. The Altium schematic is configured with variants, which will change the TVS diode model to match the negotiated voltage.
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Power Configuration
Resistor Dividers
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If the source device cannot supply voltage between the minimum and maximum voltages set by pins ADCIN1 and ADCIN2 ORthe operating/maximum current is violated, then the controller will signal a capabilities mismatch and (assumedly) run the CAP_MIS pin high.
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