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LMZ14202电源高频噪声大

Other Parts Discussed in Thread: LMZ14202

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。