A voltage regulator which provides sequentially and arbitrarily shaped regulated voltage, the voltage regulator comprising: an amplifier (110, 310) coupled to a reference voltage and a feedback voltage for generating a control signal, the amplifier (110, 310) comprising: a first input end coupled to the reference voltage; a second input end coupled to the feedback voltage; and an output end for outputting the control signal; a power device (120, 320) comprising: a first input end coupled to an input voltage; a second input end coupled to an output voltage; and a control end coupled to the control signal; characterized in that the voltage regulator further comprises: a delay signal generator coupled to an externally applied power-on burst signal for generating a plurality of sequential delay signals each having distinct delay time with respect to the power-on burst signal; and a voltage-generating circuit coupled to the output voltage and the plurality of sequential delay signals for generating the feedback voltage, the voltage-generating circuit having an equivalent resistance adjusted according to the plurality of sequential delay signals and comprising: a first node for receiving the output voltage; a second node for outputting the feedback voltage; a first resistor circuit coupled between the first node and the second node of the voltage-generating circuit; and a second resistor circuit coupled between the second node of the voltage-generating circuit and a bias voltage. an amplifier (110, 310) coupled to a reference voltage and a feedback voltage for generating a control signal, the amplifier (110, 310) comprising: a first input end coupled to the reference voltage; a second input end coupled to the feedback voltage; and an output end for outputting the control signal; a first input end coupled to the reference voltage; a second input end coupled to the feedback voltage; and an output end for outputting the control signal; a power device (120, 320) comprising: a first input end coupled to an input voltage; a second input end coupled to an output voltage; and a control end coupled to the control signal; a first input end coupled to an input voltage; a second input end coupled to an output voltage; and a control end coupled to the control signal; characterized in that the voltage regulator further comprises: a delay signal generator coupled to an externally applied power-on burst signal for generating a plurality of sequential delay signals each having distinct delay time with respect to the power-on burst signal; and a voltage-generating circuit coupled to the output voltage and the plurality of sequential delay signals for generating the feedback voltage, the voltage-generating circuit having an equivalent resistance adjusted according to the plurality of sequential delay signals and comprising: a first node for receiving the output voltage; a second node for outputting the feedback voltage; a first resistor circuit coupled between the first node and the second node of the voltage-generating circuit; and a second resistor circuit coupled between the second node of the voltage-generating circuit and a bias voltage. a delay signal generator coupled to an externally applied power-on burst signal for generating a plurality of sequential delay signals each having distinct delay time with respect to the power-on burst signal; and a voltage-generating circuit coupled to the output voltage and the plurality of sequential delay signals for generating the feedback voltage, the voltage-generating circuit having an equivalent resistance adjusted according to the plurality of sequential delay signals and comprising: a first node for receiving the output voltage; a second node for outputting the feedback voltage; a first resistor circuit coupled between the first node and the second node of the voltage-generating circuit; and a second resistor circuit coupled between the second node of the voltage-generating circuit and a bias voltage. a first node for receiving the output voltage; a second node for outputting the feedback voltage; a first resistor circuit coupled between the first node and the second node of the voltage-generating circuit; and a second resistor circuit coupled between the second node of the voltage-generating circuit and a bias voltage.