The SC453 IC is a single chip high-performance Hysteretic PWM controller. With its integrated SmartDriverTM, it powers advanced graphics and core processors. It provides sleep mode and boot voltage support. Automatic "powersave" is present to prevent negative current flow in the low-side FET during light loading conditions saving even more power. The high side driver initially turns on with a weak drive to reduce ringing, EMI, and capacitive turn-on of the low side.