LMZ14202，Ron=50k，输入12V，输出-5V，输入电容钽电容47uF+陶瓷10uF，输出电容陶瓷（47uF+0.1uF+100pF），为什么高频噪声很多呀，展宽后，噪声波形宽度大概20ns、10nS、5ns都有，不知是否是我的电容的ESR并没有达到要求，所以滤不掉高频噪声。
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