Patent ID: 8111054

Claim:
A voltage conversion device capable of enhancing conversion efficiency comprising: a charge pump for generating an output voltage linearly related to an input voltage; a feedback unit for generating a feedback signal according to the output voltage generated by the charge pump; and a regulating unit for outputting and adjusting the input voltage according to the feedback signal provided by the feedback unit, for keeping the output voltage at a predefined level, the regulating unit comprising: a voltage output end coupled to the charge pump, for outputting the input voltage; a feedback end coupled to the feedback unit, for receiving the feedback signal; an operational amplifier comprising a positive input end, a negative input end, and an output end; a p-type metal oxide semiconductor transistor comprising a gate coupled to the output end of the operational amplifier, a source coupled to a voltage generator, and a drain coupled to the voltage output end; a first resistor comprising one end coupled to the drain of the p-type metal oxide semiconductor transistor and the voltage output end, and another end coupled to the positive input end of the operational amplifier; and a second resistor comprising one end coupled to the first resistor and the positive input end of the operational amplifier, and another end coupled to the ground end; wherein the feedback signal is a current signal.