Semiconductor device providing preset output voltage

摘要

The output voltage corresponds to a supply HV reaction to an internally generated signal. The module contains a semiconductor substrate (10), on which is formed a first region (IR1), containing a first MOSFET (101), whose drain receives the supply HV, while the preset output voltage is available at its source. On the substrate is formed a second region (IR2), insulated from the first one and containing a Zener diode (105), whose anode is coupled to the first MOSFET source, while its cathode is coupled to its gate. In the second region is formed a second MOSFET (103), whose drain is coupled to the first MOSFET gate while its source lies on earth.