Hysteretic window adjustment of tri-level switching regulator

A tri-level hysteretic switching regulator comprising:

• a first hysteretic comparator;
• a second hysteretic comparator, the first hysteretic comparator and the second hysteretic comparator coupled to a high-side transistor, a mid-side transistor, and a low-side transistor and configured to control the high-side transistor, the mid-side transistor, and the low-side transistor;
• and
• means for generating a threshold reference, the threshold reference generating means coupled to inputs of the first hysteretic comparator and the second hysteretic comparator, the threshold reference generating means configured to adjust at least one hysteresis threshold voltage of the first hysteretic comparator and the second hysteretic comparator.