Band gap reference circuit for low voltage and semiconductor device including the same

A low voltage semiconductor device comprising:

• a band gap reference circuit generating a reference voltage insensitive to a temperature change on the basis of a power source voltage;
• an interior voltage generator generating an interior voltage on the basis of the reference voltage;
• and
• an interior circuit using the interior voltage as an operation power source and operated when the interior voltage is supplied,
• wherein the band gap reference circuit comprises:
• a comparator comparing a first voltage and a second voltage and outputting a control voltage according to the comparison result;
• a first current source circuit supplying a first current to a first node in response to the control voltage;
• a second current source circuit supplying a second current to a second node in response to the control voltage;
• a first load circuit generating first and second voltages determined by the first current received through the first node and the resistance value thereof;
• and
• a second load circuit generating a reference voltage determined by the second current received through the second node and the resistance value thereof.

A low voltage semiconductor device comprising:

• a band gap reference circuit generating a reference voltage insensitive to a temperature change on the basis of a power source voltage;
• an interior voltage generator generating an interior voltage;
• a detector detecting whether the interior voltage is different from the reference voltage and outputting a detection signal according to the detection result;
• and
• an interior circuit using the interior voltage as an operation power source and operated when the interior voltage is supplied,
• wherein the interior voltage generator increases or decreases the interior voltage according to the detection signal, and
• the band gap reference circuit comprises:
• a comparator comparing a first voltage and a second voltage and outputting a control voltage according to the comparison result;
• a first current source circuit supplying a first current to a first node in response to the control voltage;
• a second current source circuit supplying a second current to a second node in response to the control voltage;
• a first load circuit generating first and second voltages determined by the first current received through the first node and the resistance value thereof;
• and
• a second load circuit generating a reference voltage determined by the second current received through the second node and the resistance value thereof.