TL3844BDRIC REG CTRLR BST FLYBK CM 14SOIC|TEXAS INSTRUMENTS|Lead free|RoHS Compliant UC3844BDR2G UC3844BDR2G UC3844BVDR2G TL3844BDRG4IC REG CTRLR BST FLYBK CM 14SOIC|TEXAS INSTRUMENTS|Lead free|RoHS Compliant UC3844BDR2G UC3844BDR2G UC3844BVDR2G