Voltage regulator having positive temperature coefficient for self-compensation and related method of regulating voltage

A method of regulating a boost voltage generated by a boost circuit, the method comprising:

• receiving a regulated voltage derived from the boost voltage;
• receiving a constant reference voltage;
• producing a feedback signal based on a comparison of the regulated voltage to the reference voltage, the producing affected by one or more performance characteristics;
• providing the feedback signal to the boost circuit for controlling the generated boost voltage;
• and
• generating a variable current associated with the feedback signal to mitigate the affect of the one or more performance characteristics based on the comparison and the feedback signal such that the boost voltage is generated to be substantially constant, the variable current also affected by one or more performance characteristics.

A boost circuit, comprising:

• a charge pump operable to provide a boost voltage;
• an oscillator coupled to the charge pump and configured to regulate operation of the charge pump;
• and
• a voltage regulator operable to provide a feedback signal to the oscillator for regulating the oscillator, the voltage regulator comprising:
• a regulated voltage input operable to receive a regulated voltage derived from the boost voltage;
• a reference voltage input operable to receive a constant reference voltage;
• an output node operable to provide the feedback signal;
• at least one transistor coupled to the regulated voltage input, the reference voltage input, and the output node, and operable to produce the feedback signal based on a comparison of the regulated voltage to the reference voltage;
• and
• a variable current source coupled to the output node and having one or more performance characteristics, the variable current source operable to generate a variable current at the output node to mitigate the affect of one or more performance characteristics of the at least one transistor based on the comparison and the feedback signal such that the charge pump generates the boost voltage to be substantially constant.

A method of regulating a boost voltage, the method comprising:

• generating a boost voltage using a boost circuit;
• controlling boost circuit using a boost generating signal;
• and
• regulating the boost generating signal with a feedback signal, the regulating comprising:
• receiving a regulated voltage derived from the boost voltage;
• receiving a constant reference voltage;
• producing the feedback signal based on a comparison of the regulated voltage to the reference voltage, the producing affected by one or more performance characteristics;
• and
• generating a variable current associated with the feedback signal to mitigate the affect of the one or more performance characteristics based on the comparison and the feedback signal such that the boost voltage is generated to be substantially constant, the variable current also affected by one or more performance characteristics.