Patent ID: 6867640
Filing Date: 2005-03-15
Classification: H01L

Abstract:
1. An integrated voltage regulator and reverse voltage protection circuit comprising the following: a first double-sided extended drain field effect transistor of a first carrier type and having a source terminal coupled to a first voltage source; a second double-sided extended drain field effect transistor of the first carrier type and also having a source terminal couple to the fast voltage source, and having a drain terminal coupled to a gate terminal of the first double-sided extended drain field effect transistor of the first carrier type; a first resistor that is coupled between the first supply voltage and a body terminal of the first double-sided extended drain field effect transistor of the first carrier type and a body terminal of the second double-sided extended drain field effect transistor of the first carrier type; a second resistor; a third resistor coupled with the second resistor in series between a drain terminal of the first double-sided extended drain field effect transistor of the first carrier type and a second voltage source; an extended drain field effect transistor of a second carrier type opposite the first carrier type, having a drain terminal coupled to the drain terminal of the second double-sided extended drain field effect transistor, and having a source terminal coupled to the second voltage source; and an amplifier having an output terminal coupled to a gate terminal of the extended drain field effect transistor of the second carrier type.