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https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1278274/lp87745-q1-boost-output-not-correct
为什么5V 的纹波如此之高？ 如何解决？
2. 工作几分钟后，5V 稳压器将关闭，输出降低到2.8V。
请参阅附件中的问题图和原理图。
e2e.ti.com/.../issue.xlsx
最终解决
