Voltage regulator circuit, low dropout regulator chip, chip system, and electronic device

A low dropout regulator chip, comprising a substrate and a voltage regulator circuit, wherein the voltage regulator circuit, comprises:

• a voltage input end, a voltage output end, a first voltage end, and a second voltage end;
• a low dropout regulator, the low dropout regulator configured to:
• receive a reference voltage at the voltage input end;
• and
• output a first voltage, wherein
• the voltage output end is configured to:
• receive the first voltage;
• and
• output a second voltage;
• a first comparator, the first comparator configured to:
• receive a first threshold voltage at the first voltage end and the second voltage;
• and
• output a first comparison result;
• a first delay circuit, the first delay circuit configured to:
• receive the first comparison result;
• and
• output a plurality of first control signals;
• and
• a plurality of first switch circuits connected in parallel, wherein each first switch circuit is configured to:
• receive the first control signal;
• and
• regulate connection and disconnection between the second voltage end and the voltage output end;
• and
• wherein the voltage regulator circuit is disposed on the substrate.

A chip system, comprising a voltage regulator circuit, wherein the voltage regulator circuit, comprises:

• a voltage input end, a voltage output end, a first voltage end, and a second voltage end;
• a low dropout regulator, the low dropout regulator configured to:
• receive a reference voltage at the voltage input end;
• and
• output a first voltage;
• wherein the voltage output end is configured to:
• receive the first voltage;
• and
• output a second voltage;
• a first comparator, the first comparator configured to:
• receive a first threshold voltage at the first voltage end and the second voltage;
• and
• output a first comparison result;
• a first delay circuit, the first delay circuit configured to:
• receive the first comparison result;
• and
• output a plurality of first control signals;
• and
• a plurality of first switch circuits connected in parallel, wherein each first switch circuit is configured to:
• receive the first control signal;
• and
• regulate connection and disconnection between the second voltage end and the voltage output end;
• and
• wherein the voltage output end of the voltage regulator circuit is coupled to a load circuit.

An electronic device, comprising a voltage regulator circuit, wherein the voltage regulator circuit, comprises:

• a voltage input end, a voltage output end, a first voltage end, and a second voltage end;
• a low dropout regulator, configured to:
• receive a reference voltage at the voltage input end;
• and
• output a first voltage, wherein
• the voltage output end is configured to:
• receive the first voltage;
• and
• output a second voltage;
• a first comparator, configured to:
• receive a first threshold voltage at the first voltage end and the second voltage;
• and
• output a first comparison result;
• a first delay circuit, configured to:
• receive the first comparison result;
• and
• output a plurality of first control signals;
• and
• a plurality of first switch circuits connected in parallel, wherein each first switch circuit is configured to:
• receive the first control signal;
• and
• regulate connection and disconnection between the second voltage end and the voltage output end;
• and
• wherein the voltage regulator circuit is disposed on a circuit board.