How do you use Ctrl (Remote on/off) function?

Remote on/off function is turning power module on or off by level control. When voltage of Ctrl pin is higher than DC-DC on level, the converter will be turned on. And when the voltage of Ctrl pin is in lower level, the converter will be turned off. An external circuit can be used to drive the remote on/off function, like MOSFET or BJT. If you’re not using the remote on/off function, just leave the CTRL pin open.