Immediate response low dropout regulation system and operation method of a low dropout regulation system

An immediate response low dropout regulation system, comprising:

• a low dropout regulation unit for generating and outputting an inner output voltage according to a reference voltage;
• a tracking voltage generation unit for generating a first tracking voltage and a second tracking voltage according to the reference voltage, wherein a voltage difference between the first tracking voltage and the inner output voltage is in positive correlation with constant times of a first threshold voltage of a first transistor within in the tracking voltage generation unit and is independent of the reference voltage, and a voltage difference between the second tracking voltage and the inner output voltage is in positive correlation with constant times of a second threshold voltage of a second transistor within in the tracking voltage generation unit and is independent of the reference voltage;
• and
• a self-driving unit coupled to the low dropout regulation unit and the tracking voltage generation unit, wherein when the voltage difference between the first tracking voltage and the inner output voltage is greater than the constant times of the first threshold voltage, the self-driving unit provides a first compensation current to the output terminal of the low dropout regulation unit;
• and when the voltage difference between the inner output voltage and the second tracking voltage is greater than the constant times of the second threshold voltage, the self-driving unit sinks a second compensation current from the output terminal of the low dropout regulation unit.

An operation method of a low dropout regulation system, the low dropout regulation system comprising a low dropout regulation unit, a tracking voltage generation unit, and a self-driving unit, the operation method comprising:

• the low dropout regulation unit generating and outputting an inner output voltage according to a reference voltage;
• the tracking voltage generation unit generating a first tracking voltage according to the reference voltage, wherein a voltage difference between the first tracking voltage and the inner output voltage is in positive correlation with constant times of a first threshold voltage of a first transistor within in the tracking voltage generation unit and is independent of the reference voltage;
• and
• the self-driving unit executing a corresponding operation according to the inner output voltage and the first tracking voltage.