TPS6211X Driving EN and SYNC pin
The TPS6211x high-input-voltage buck converters operate over a wide, input-voltage range. The control and input signal can also be controlled from 1.8-V logic levels up to maximum input voltage.
One characteristic of the EN and SYNC control circuits is the increase in leakage current when these pins are driven by a voltage level less than 4 V.
In this application report, the difference in the two leakage current specifications is explained, when they apply, and the impact on drive circuits.