Abstract: A system for driving a plurality of high side NMOS power switches includes a charge pump to generate a boot voltage across a charge pump capacitor and a plurality of high side drivers. Each high side driver includes a PMOS switch to turn on the high side NMOS power switch and an NMOS switch to turn off the high side NMOS power switch. A first inverter chain coupled between the boot voltage and the input voltage generates a first control signal to control the PMOS switch and a second inverter chain coupled between an internal boot voltage and the floating switch node generates a second control signal to control the NMOS switch. The boot voltage can be equal to the input voltage plus a regulator voltage and is substantially independent of a voltage at the floating switch node and the internal boot voltage can be equal to a voltage at the floating switch node plus a regulator voltage.