The herein schematic shows FAN5009 dual bootstrapped 12V high frequency MOSFET driver typical application
circuit. It can be formed a complete core voltage regulator for
microprocessors if combined with multi-phase PWM controller and power
MOSFETs, according to the FAN5009 datasheet.
Related to the application schematic, these drivers can be applied as Supply Capacitor Selection, Bootstrap Circuit, Low and High Side Driver, and Adaptive Gate Drive Circuit.
See more about FAN5009 MOSFET Driver Typical Application Circuit in the datasheet (source: fairchildsemi.com)