Low dropout regulator

A low dropout regulator comprising:

• an error amplifier, comprising a pair of differential input transistors and loads respectively directly connected to the pair of differential input transistors, wherein, a gate of a first input transistor in the pair receives a reference voltage and a gate of a second input transistor in the pair receives an output voltage of the low dropout regulator or a sampled voltage obtained by sampling the output voltage;
• a power transistor, a gate of which is coupled to an output terminal of the error amplifier, and a drain of which serves as an output node to output the output voltage;
• a first frequency compensation branch, comprising a first frequency compensation capacitor and a current amplifier for amplifying the current flowing through the first frequency compensation capacitor, wherein, the first frequency compensation capacitor is coupled between the output node and the current amplifier, and the current amplifier is coupled to the output terminal of the error amplifier or a first internal node of the error amplifier so as to form a first negative feedback loop in the low dropout regulator;
• and
• a second frequency compensation capacitor, one terminal of which is directly connected to a second internal node of the error amplifier and the other terminal of which is directly connected to the output node, so as to form a left half-plane zero of the low dropout regulator, the second internal node is a node at which the first input transistor and the load of the first input transistor are directly connected.