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I'm not sure, what the current consumption of the CP2102 is, when no USB is connected. In the datasheet it states:

https://www.mouser.de/datasheet/2/368/cp2102n_datasheet-1634912.pdf

enter image description here

And there is this USB pull-up specification. What does this mean? When no USB cable is connected, it draws around 200uA?

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  • \$\begingroup\$ Did you read the footnote 3? \$\endgroup\$ – Justme Oct 13 '20 at 8:00
  • \$\begingroup\$ Ah i get it now, these currents are just from the pull-up. So the controller will always draw some decent amount. \$\endgroup\$ – HansPeterLoft Oct 13 '20 at 8:29
  • \$\begingroup\$ The pull-up current is not consumed if USB cable is disconnected. \$\endgroup\$ – Justme Oct 13 '20 at 8:55
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I have found that the CP2102 doesn't always power down into suspend mode, so it draws 20mA even when the USB cable is disconnected.

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