用3片TPS62822,分别输出1.2V 1.8V和3.3V给OMAPL138供电,1.2V 1.8V在空载是都是稳定输出的情况下,接到CPU进行供电后,1.2V和1.8V就会出现明显的波动,3.3V是稳定的,不清楚是什么原因
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Hi
有没有用电子负载测试看看输出电压波形?
从波形看,我看不到明显的异常,可以将输出电容适当再加大一点,例如2个10uF. 另外是否有cff电容?