Shunt controller for controlling input potential, has control unit setting current flowing through voltage drop circuit or threshold value depending on input potential and/or preset value for threshold value

摘要

The controller has input (IN) for supplying an input potential (V in). An output (OUT) picks an output potential (VDD shunt). A voltage drop circuit switches between the input and the output potentials, where a voltage difference between the input potential and the output potential falls during the operation of the controller over the voltage drop circuit. A control unit (201) sets the current flowing through the voltage drop circuit or a threshold value depending on the input potential and/or a preset value for the threshold value.