Low dropout regulator circuit and power supply

The invention provides a low dropout regulator circuit and a power supply. The circuit comprises a first amplifier, a second amplifier, a first compensation capacitor, a second compensation capacitor, a variable resistance device, a resistance feedback network and a load module; the positive-going input end of the first amplifier is connected with a reference voltage signal; the positive-going input end of the second amplifier is connected with a voltage output end, and the negative-going input end is connected with the output end of the first amplifier; one end of the first compensation capacitor is connected with the output end of the first amplifier, and the other end of the first compensation capacitor is grounded; one end of the second compensation capacitor is connected with the output end of the second amplifier, and the other end of the second compensation capacitor is connected with the voltage output end; the variable resistance device is provided with the resistance adjustment end, the first input end and the first output end, wherein the resistance adjustment end is connected with the output end of the second amplifier, the first input end is connected with the input voltage end, and the first output end is connected with the voltage output end; the resistance feedback network is provided with the second input end, the second output end and the partial pressure signal output end, wherein the second input end is connected with the voltage output end, the second output end is grounded, and the partial pressure signal output end is connected with the negative-going input end of the first amplifier; one end of the load module is connected with the voltage output end, and the other end of the load module is grounded.