创唯电子代理销售National Semiconductor, LM2574MX-5.0/NOPB, LM2574MX-ADJ/NOPB, LM2574N-12/NOPB, LM2574N-15/NOPB, LM2574N-3.3/NOPB, LM2574N-5.0/NOPB, LM2574N-ADJ/NOPB, LM2575HVM-12/NOPB, LM2575HVM-15/NOPB, LM2575HVM-5.0/NOPB, LM2575HVM-ADJ/NOPB, LM2575HVMX-12/NOPB.