\documentclass{standalone}

\usepackage{tikz,pgfplots}
\usepackage{siunitx}
\usepackage[siunitx,european]{circuitikz}
\usepackage{mathrsfs}
\usetikzlibrary{arrows}
\usepackage{amsbsy}
\usetikzlibrary{fadings}
\usetikzlibrary{patterns}
\usetikzlibrary{automata,positioning}
\usepackage{mwe,subcaption,tikz}
\tikzset{boximg/.style={remember picture,red,thick,draw,inner sep=0pt,outer sep=0pt}}
\pgfplotsset{compat=1.11}
\begin{document}
\definecolor{mygreen}{rgb}{0,0.78,0}
\begin{tikzpicture}

	\draw (3,0) to [short, o-] (0,0)
	to [european inductor] (0,2) 
	to [Do, i=$i_D$] (2,2)
	to [short, -o, i=$I_{out}$] (3,2)
	(2,0) to [C, l=$C_{out}$, *-*, i_=$i_{Cout}$] (2,2)
	(3.25,2.25) to [open, v^=$U_{out}$] (3.25,-0.25);
	

\end{tikzpicture}
\end{document}