Help for current consuption in MCU (Little bit Overwhelming)

[Aldo_Flores_Aguayo]

Hi, I`m totally new to STM32 MCUs and started a project for an application using the STM32L4P5CG MCU, I´m in the step of selecting a correct external LDO voltage regulator, I look at the PCC of STM32IDE but it seems confusing for me how to use it (I wanted the current consuption estimation) , I would like to know what should be the maximum current needed for my LDO voltage regulator based on the current my MCU will consume, I look at the datasheet for the mentioned MCU and found this, 

So if the maximum current into sum of all VDD power lines is 200mA for the MCU, the minimum current needed for my LDO voltage regulator is 200mA? because the MCU can deliver more current than the current it accepts, is this correct? 

Hope you can help me, its the first time I´m doing this desing with STM32 MCUs 

[TDK · Accepted solution]

Yes, an LDO with 200 mA will be sufficient.

In practice, the MCU will likely only consume tens of mA. It will consume additional current if you are powering other things through the GPIO pins or driving lots of signals. Depends on your application, but consumption over 30 mA or so is not typical on smaller projects.