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LM27403 DC降压1.6V,负载后电压降低至0.6V

原理图见附件

关于mmbt9034的三极管 不知接法是否正确

现在不接负载 1.6V正常 ,接了负载后到0.6V ,用石电阻接 ,到0.2V了,不得其解啊

lm27403.pdf