TPS61378-Q1: Convex plate on SW

Below is the schematic that used TPS61378-Q1 as the regulator to output 5V. The input voltage is 3.3V and use an external MOSFET to switch on or off this power input.

The waveform of the SW shows a convex plate both on the rising and falling edge. The internal power expert thinks that this may cause the high-side MOSFET and low-side MOSFET turn on simultaneously. Do you think there is a risk and could you explain why there is a convex plate especially on the falling edge.

Johnsin Tao：

HI

     建议严格参考datasheet layout, 特别注意SW脚，避免寄生参数。

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Mark Dai：

Hello

layout是按照datasheet推荐的，我们在其他项目上也发现了有这个问题，能否帮忙确认下是否有风险。

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Johnsin Tao：

Hi    只要不超过SW脚耐压风险就很小。