A switched-capacitor type voltage regulator is provided. The regulator
includes a flying capacitor and switches, including first and second
transistors which operate as switches. The switches are arranged to
operate such that the flying capacitor is coupled to an input voltage
during a first phase, and switched to provide an output voltage during a
second phase. During the first phase, the first transistor is employed to
couple the capacitor to the input voltage, and a second transistor is
employed to couple (the other side of) the capacitor to another node
(e.g. Ground). Additionally, another switch is coupled between the gate
and the drain of either the first transistor or the second transistor.
Also, during the first phase, if the input voltage is greater than the
output voltage, the other switch is closed so that the transistor that
the other switch is connected to operates as a diode.