Low-dropout regulator circuit with high loop stability based on load-dependent zero mobile compensation and method thereof

A low-dropout regulator (LDO) circuit with high loop stability based on a load-dependent zero mobile compensation, wherein the LDO circuit with high loop stability comprises a LDO circuit body based on the load-dependent zero mobile compensation, the LDO circuit body includes a first PMOS transistor configured to follow load variations;

• the LDO circuit with high loop stability further comprises a dynamic-resistance-boosting-circuit adaptively connected with the first PMOS transistor;
• for a load adaptively connected to the LDO circuit body, varying states of the load are represented according to a source-drain dropout voltage between a source terminal of the first PMOS transistor and a drain terminal of the first PMOS transistor, when the represented varying state of the load is matched with a preset load varying threshold in the dynamic-resistance-boosting-circuit, a dynamically variable resistor in parallel with the first PMOS transistor is generated according to the varying state of the load by the dynamic-resistance-boosting-circuit;
• the dynamically variable resistor is connected in parallel with the first PMOS transistor following the load variations and acting as a resistor to form a load equivalent resistor, wherein a value for the formed load equivalent resistor is less than an equivalent resistance maximum value for the first PMOS transistor in a stable loop state, so that a high frequency pole frequency of the LDO circuit body is greater than a unit gain frequency of the LDO circuit body.