LM2673SD-12 LM2673SD-12/NOPB LM2673SD-3.3 LM2673SD-3.3/NOPB LM2673SD-5.0 LM2673SD-5.0/NOPB LM2673SD-50 LM2673SD-ADJ LM2673SD-ADJ/NOPB LM2673SDX-12