Patent ID: 9673698
Date: 2017-06-06
CPC Classifications: G05F,H02M

Claim:
1. A voltage regulator, comprising: an input configured to receive an input voltage Vin; an output configured to provide an output voltage Vout; a voltage divider including at least a first resistor and a second resistor with a resistance ratio of 1 (X−1), the input being connected to the first resistor and the output being connected to the second resistor; a voltage source configured to provide a reference voltage Vref to a connecting point between the first resistor and the second resistor; and at least one working circuit directly connected to the output to provide the output voltage as Vout=Vin−X(Vin−Vref); wherein the working circuit includes a pull down current source, and a negative charge pump configured to provide a negative voltage to the output.