LP38690SD-1.8 LP38690SD-1.8/NOPB LP38690SD-1.8+ LP38690SD-1.8-NS LP38690SD-2.5 LP38690SD-2.5/NOP8 LP38690SD-2.5/NOPB LP38690SD-3.3 LP38690SD-3.3/NOPB LP38690SD-3.3/NOPB 其他IC