I like to design a DCDC Converter that generates a negativ Voltage of 3,3V. The Circuit is supplyed from positiv 12V.
I'm using at the same PCB a LT8642S as positiv Buck Regulator. To keep the amount of different components small, i like to use a second LT8642S as inverting Buck regulator.
Is this possible in that way that is described in "Application Note AN-1168" ?
I tryed to simulate this in LT SPice, sadly the simulation runs since 3 houres without a result...