The TPD3S714-Q1 is capable of handling up to 18-V DC on the VD+, VD–, and V_{BUS_CON} pins. In the event of a short-to-battery on V_{BUS_CON}, significant ringing is expected because of the hot plug-like nature of the short-to-battery event. In typical ceramic capacitor configurations, a standard RLC response is expected which results in a ringing of nearly two times the applied DC voltage. The TPD3S714-Q1 is capable of withstanding the transient ringing from hot plug-like events, assuming some precautions are taken.

Careful capacitor selection on the V_{BUS_CON} pin must be observed. A capacitor with a low derating percentage under the applied voltages must be used to prevent excess ringing. In the example, a 1-µF 100-V tolerant ceramic X7R capacitor is used. It is best practice to carefully select the capacitors used in this circuit to prevent derating-based voltage spikes under hot plug events. See the application example graphs, Figure 9-4 and Figure 9-5 to compare ringing of a 100-V capacitor to a 50-V capacitor. Figure 9-6 shows the 100-V capacitor with the TPD3S714-Q1 installed.

Another alternative to a high rated ceramic capacitor is to implement either a standard R-C snubber circuit, or a small external TVS diode. Depending on the short-to-battery tolerance needed, no special precautions may be needed.

For more information on this topic, see the white paper Designing USB for short-to-battery tolerance in automotive environments.