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

摘要

An immediate response low dropout regulation system includes a low dropout regulation unit, a tracking voltage generation unit, and a self-driving unit. The low dropout regulation unit is used for generating and outputting an inner output voltage according to a reference voltage. The tracking voltage generation unit is used for generating and outputting a tracking voltage according to the reference voltage. The self-driving unit is coupled to the low dropout regulation unit and the tracking voltage generation unit. When a voltage difference between the tracking voltage and the inner output voltage is greater than a constant times threshold voltage, the self-driving unit provides a compensation current to an output terminal of the low dropout regulation unit.

主权项

1. 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 tracking voltage according to the reference voltage, wherein a voltage difference between the tracking voltage and the inner output voltage is in positive correlation with constant times of a threshold voltage of a 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 tracking voltage and the inner output voltage is greater than the constant times of the threshold voltage, the self-driving unit provides a compensation current to an output terminal of the low dropout regulation unit.