LM2677SD-50 LM2677SD-ADJ LM2677SD-ADJ/NOPB LM2677SDX-12 LM2677SDX-12/NOPB LM2677SDX-3.3 LM2677SDX-3.3/NOPB LM2677SDX-5.0 LM2677SDX-ADJ LM2677SDX-ADJ/NOPB