SLUSCC7C July 2016 – June 2018 TPS546C23
An R-C snubber must be placed between the switching node and PGND to reduce voltage spikes on the switching node. The power rating of the resistor must be larger than the power dissipation on the resistor with sufficient margin. To balance efficiency and spike level, a 1-nF capacitor and a 1-Ω resistors were selected for this design.
In this example an 0805 resistor was selected, which is rated for 0.125 W.