LM2673S12NOPB LM2673S-12-NS LM2673S-13+ LM2673S-3.3 LM2673S-3.3/NOPB LM2673S-3.3NS LM2673S-3.3-TI LM2673S-5 LM2673S5.0 LM2673S-5.0