IR 888 OptiMOS™ IPOL25 A single-voltage synchronous Buck regulatorPin descriptionsPin#Pin NameI/OTypePin Description Supply voltage for the high side driver. Connect this pin to 20 Boot I Analog the SW pin through a bootstrap capacitor. 21 EN I Analog Enable pin to turn the IC on and off. Not 22 NC - Not connected internally. They can be left floating on PCB. connected Final Datasheet 8 of 49 V2.1 2019-12-11 Document Outline Revision History Trademarks Disclaimer