Patent ID: 8487598

Claim:
An integrated circuit DC-DC voltage converter comprising: A. a DC power supply lead and a ground lead; B. an output lead; C. a first transistor, a second transistor, and a bias transistor connected in series between the power supply lead and the ground lead, the bias transistor being connected between the first transistor and the second transistor, and the output lead being connected between the bias transistor and the second transistor, the transistors each having a control lead, the control leads of the first and second transistors each receiving switching signals to turn the first and second transistors on and off to generate a desired DC voltage between an upper limit and a lower limit on the output lead; and D. a unity-gain feedback amplifier having one input coupled to a reference voltage, another input, and an output, the other input is connected to the output, and the output is connected to the control lead of the bias transistor.