The LM27342(buck convertor) datasheet says:
"The recommended input capacitance is 10µF, Make sure to verify if there is any significant change in capacitance at the operating input voltage"
My input voltage is 24v, so I chose an input capacitor rated 10uF/50V. But the capacitor's dc-bias graph shows that its capacitance will reduce 37%(reduce to 6v) at 24v dc bias. Much less than the 10uF input capacitance.
Does it mean I have to choose another capacitor to make sure its capacitance is 10uF at 24v dc-bias(24v input voltage)?
The 10uF/50v capacitor is TDK C5750X7R1H106K(230KB), its capacitance-voltage graph is shown below