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UCC27511: used as driver for HS MOS

Part Number: UCC27511

Hi Team, 

Just want to check if below use is OK or not. 

UCC27511 is a LS driver and I'd like to use it as below to drive HS MOS. 

below is a buck HS output, using boostrap to drive HS MOS. Then connect SW to GND pin of UCC27511, BTST1 connect to Vdd of UCC27511,HIDRV connnect to IN+ of UCC27511,  then connect OUTH/L to gate of HS mos, does it works?  

I think it should work, but during test, BTST1-SW1 is only ~2V, but the REGN should be ~5V.  so want to double check with you on this. Thanks.