LM2940-12-TA3-T-VB LM2940-12V LM2940-3.3 LM2940-5 LM2940-5.0 LM2940-5.0 MDE LM2940-5.0-MW8 LM2940-5.0V LM2940-5.0VT/R LM2940-50CKCSE3