The SiC45x is a PMBus 1.3 compliant non-isolated DC/DC buck regulator with integrated MOSFETs. It is capable of supplying up to 40 A (SiC450) continuous output current. Its output voltage is digitally adjustable from 0.3 V to 12 V from a 4.5 V to 20 V input with switching frequencies up to 1.5 MHz. SiC45x architecture delivers ultrafast transient response with minimum output capacitance and tight regulation over a broad load range. The device has integrated internal compensation and is stable with any type of output capacitor. The device incorporates a power saving scheme that significantly increases light load efficiency. The SiC45x allows power block configuration programs to be stored in non volatile memory (NVM). Various operation parameters can all be locally stored and used to determine fault behavior. Operation is firmware based and is field upgradable Pinstrap option is also available for default configuration without PMBus. The SiC45x is available in lead (Pb)-free power enhanced MLP 5 mm x 7 mm package.