Methods and apparatus for voltage selection for a MOSFET switch device

A method, comprising:

• electrically coupling, during a first time period and using a first P-type metal-oxide-semiconductor field-effect transistor (MOSFET) PMOS device, a first voltage rail coupled to a voltage selector to a second voltage rail in response to activation of the first PMOS device;
• electrically coupling, during a second time period and using a second PMOS device, a charge pump voltage produced by a charge pump device to the second voltage rail in response to activation of the second PMOS device;
• and
• activating a pass gate coupled to the second voltage rail based on a voltage of the second voltage rail during the second time period.

An apparatus, comprising:

• a first voltage rail;
• a second voltage rail;
• a pass gate having a gate coupled to the second voltage rail;
• a P-type metal-oxide-semiconductor field effect transistor (MOSFET) PMOS device coupled between the first voltage rail and the second voltage rail;
• a voltage selector coupled to the second voltage rail and configured to apply a voltage from a set of voltages to the gate of the pass gate via the PMOS device and the second voltage rail;
• and
• a charge pump device configured to apply a charge pump voltage to the gate of the pass gate via the second voltage rail.