High current switching capacitor converter for on-package VR

Digital ASIC devices are widely used in networking and computing applications. This kind of devices are implemented with a short channel technology requiring high peak currents for high complexity systems and a low supply voltage. Digital ASICs are powered by an external Voltage Regulator with specifications similar to modern microprocessors' power supply (VRMs). In order to reduce the number of power pins and to reduce the Power Distribution Network (PDN) issue, Intel's® 4th generation CoreTM [1] integrates Voltage Regulators, moreover many on-package conversion systems [2], [5] are present in literature. In this paper a conversion solution based on switched resonant tank is presented, yielding currents up to 300 A, on 0.8 V in an area of 10 cm² with a resonant-driving technique.