LT1388 LT138925 LT1389ACS8-1.2#PBF LT1389ACS8-1.25 LT1389ACS8-1.25#PBF LT1389ACS8-1.25#TR LT1389ACS8-1.25#TRMPBF LT1389ACS8-1.25#TRPBF LT1389ACS8-125 LT1389B5