Adjuster and chip

An adjuster, comprising a power transfer circuit, a negative feedback circuit, a constant current source circuit and a control circuit,

• wherein the negative feedback circuit comprises an error amplifier;
• an input of the error amplifier receives a reference voltage, and another input of the error amplifier receives a feedback voltage corresponding to an output signal of the adjuster;
• the error amplifier is configured to, during the starting process of the adjuster, output a first voltage signal when the feedback voltage is less than the reference voltage and output a second voltage signal when the feedback voltage is greater than the reference voltage;
• the control circuit is connected to an output of the error amplifier, and is configured to:
• control the negative feedback circuit to be turned off and the constant current source circuit to be turned on according to the first voltage signal, wherein when the constant current source circuit is turned on, the constant current source circuit is connected to the power transfer circuit, and is configured to control an input current to be constant during the starting process of the adjuster;
• and,
• control the constant current source circuit to be turned off and the negative feedback circuit to be turned on according to the second voltage signal, wherein when the negative feedback circuit is turned on, the negative feedback circuit forms a negative feedback loop with the power transfer circuit, and is configured to provide a negative feedback adjustment signal corresponding to the output signal to the power transfer circuit, and the power transfer circuit is configured to perform negative feedback adjustment to the output signal according to the negative feedback adjustment signal, thereby making the output signal is maintained at a preset level.