Please make your project public and post the link to it here so that people can see it to understand what you are asking about.

Please study the datasheet for the AO3400A. [http://aosmd.com/res/data_sheets/AO3400A.pdf](http://aosmd.com/res/data_sheets/AO3400A.pdf) Given that you have not provided any information about you application such as drain voltage, type of load, switching times,  the mosfet configuration and the way you are connecting the processor output to the mosfet the following comments are highly suppositional. For a common source configuration, a 3.3V gate drive should be more than enough for a 50mA load. A 33R resistor in series with the gate should also prevent any issues with ringing inbthe gate drive circuit.

For future reference, please read: [https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a](https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a)