UC3526DWTRIC REG CTRLR BST FLYBK VM 18SOIC|TEXAS INSTRUMENTS|Lead free|RoHS Compliant SG3526BDW SG3526DW UC3526DWTRG4IC REG CTRLR BST FLYBK VM 18SOIC|TEXAS INSTRUMENTS|Lead free|RoHS Compliant SG3526BDW SG3526DW