The new MAX8760 IC from Maxim, a dual-phase, 'Quick-PWM' step-down controller for AMD's 9G and Hammer CPU core supplies, is designed for two different, notebook CPU core applications: stepping down the battery directly or stepping down the 5 V system supply to create the core voltage. Dual 180° out-of-phase operation reduces input-ripple current requirements and output voltage ripple, while active voltage positioning with adjustable gain and offset reduces power dissipation and bulk output-capacitance requirements. The MAX8760 features soft-start, power-up sequencing, soft-shutdown, and independent four-level logic inputs for setting the suspend voltage. The switching regulator also includes output undervoltage protection, selectable overvoltage protection, thermal protection, and voltage regulator power-OK output. It is available in a low-profile, 6 x 6 mm, 40-pin thin QFN package.
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