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TPS71718 输出电压波动

Kuan Han
Prodigy 141 points
Other Parts Discussed in Thread: AM3359

设计完全按照ARM MPU AM335x EVM进行设计，TPS71718 LDO输出1.8V，用于给AM3359的VDDS_RTC供电，详细原理图，参照附件PDF，问题是：LDO输出电压在1.8V~2.1V来回波动，主控AM3359无法工作，详细波形图如下，更换LDO，问题依旧，将LDO负载断开，输出变为正常，为1.8V，帮忙分析一下是什么原因？

AM3359 - TPS71718.pdf