DC-DC Buck, Selective Voltage Binning (SVB) technique
I'm not 100% sure SVB is an acronym for Selective Voltage Binning nor am I sure that Selective Voltage Binning pertains to this type of circuit.

However, I can tell you what the highlighted circuit does.  The highlighted circuit allows for adjustment (trimming) of the regulated output voltage.  You may find that the voltage at VDD_MEDIA_CORE is monitored by a Micro or something similar.  Based on this the Micro then adjusts the duty cycle of PWM waveform SVB_PWM2_MEDIA.  This in turn affects the feedback voltage feed into the regulator which then causes the regulator to respond and adjust the output voltage.