A voltage generator and a method for generating an output voltage is presented. The generator has a current mirror circuit with a first transistor having a gate and a first terminal, and a second transistor having a gate coupled to the gate of the first transistor, and with a first terminal coupled to a feedback node. A third transistor has a gate, a first terminal and a second terminal. The first terminal is coupled to the feedback node and the second terminal is coupled to an output node. A fourth transistor has a gate coupled to the third transistor. There is a current source coupled to the output node, and a feedback circuit to detect a terminal voltage at the feedback node and to control the terminal voltage by adjusting a gate voltage at the gate of the second transistor.