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LDO电源芯片数据表中参数问题

Other Parts Discussed in Thread: TL751M-Q1

在选型的时候,看到一些芯片,噪声、PSRR打了横杠是代表什么,噪声非常小?还是没有进行测试?还是比如电源抑制比输出纹波比输入还大,没起到作用?