优信电子 YouXin Electronic 超低纹波正负电源 输入电压：±3V-±36V|输出电压：+1.4V-=20.5V/-5V 输入输出压差：低于0.5V丨输出电流：±1A 行tps8y9 3上 原装正品 企业店铺 TPS7A4701&3301线性电源模块