SiC451 Datasheet | Vishay

DESCRIPTION The Si C45x is a PMBus 1.3 pliant non-isolated DC/DC buck regulator with integrated MOSFETs. It is capable of supplying up to 40 A (Si C450) 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. Si C45x architecture delivers ultrafast transient response with minimum output capacitance and tight regulation over a broad load range. The device has integrated internal pensation and is stable with any type of output capacitor. The device incorporates a power saving scheme that significantly increases light load efficiency. The Si C45x 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 Si C45x is available in lead (Pb)-free power enhanced MLP 5 mm x 7 mm package. TYPICAL APPLICATION CIRCUIT PGOOD ENABLE BOOT PGOOD EN INPUT 4.5 V to 20 V PVIN VOUT PVCC Si C45x ADDR RT/SYNC VSET SEN+ SEN- SALRT SDA SCL Fig. 1 - Typical Application Circuit FEATURES - Versatile - Single supply operation from 4.5 V to 20 V input voltage - Scalable solution with continuous output current of 40 A (Si C450), 25 A (Si C451), 15 A (Si C453) - Continuous current of Si C451 by VOUT range - 30 A at VOUT < 2.5 V - 25 A at VOUT  2.5 V - Adjustable output voltage from 0.3 V to 12 V - Built in 5 V regulator for internal circuits and driver supply - 1 % output voltage accuracy over temperature - 0.5 % output accuracy at VOUT = 3.3 V / 1.8 V, TA = 25 °C - Ultrafast transient response - Highly...