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tps7a4700



焊接tps7a4700空载时固定输出5V正常,当负载增时,tps7a4700输出为-0.9V当增大输入点压后,输出正常,接着负载增加,输出有为负0.9V,当把负载全为空时,输入为5V,输出仅为3.5V,第一次焊接调试时,空载输入为5V时,输出为4.8V,不知为什么,是这个芯片坏掉了,用了好几个tps7a4700,有一个压降大于1V时,仍不能正常工作