Voltage reference circuit with combined power-on reset

A vehicle having an integrated circuit on a reference voltage circuit, the reference voltage circuit configured to furnish a reference voltage for the integrated circuit, the reference voltage circuit comprising:

• a voltage input for applying an operating voltage;
• a ground terminal;
• a voltage output for furnishing a reference voltage;
• a signal output for furnishing a power-on reset signal;
• and
• a current-proportional-to-absolute-temperature (IPTAT) circuit, connected between the voltage input and ground terminal, configured to generate a current proportional to the absolute temperature, the voltage reference circuit being configured to furnish the power-on reset signal only when the reference voltage has reached a target value and when additionally a current is flowing in the IPTAT circuit at a current intensity that reaches or exceeds a minimum current intensity determined by a voltage value of the operating voltage and by a pull-down resistance value.