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Vishay - SiC45x

Mixed Media - AAC201912 vishay

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The SiC45x is a PMBus 1.3 compliant non-isolated DC/DC buck regulator with integrated MOSFETs in a 5 mm x 7 mm thermally efficient package. It is capable of supplying 40 A (SiC450), 25 A (SiC451), 15 A (SiC453) continuous output current. Its output voltage is digitally adjustable from 0.3 V to 5.5 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). Operation parameters such as VOUT, IOUT, over temperature etc. can all be locally stored and used to determine fault behavior. Operation is firmware based and is field upgradable. A full featured GUI and interface board is available to program and facilitate development of SiC45x based systems.


  • 96 % peak efficiency
  • 1 % output voltage accuracy over temperature
  • Supports over 50 PMBus commands
  • Ability to support sequential, tracking and simultaneous operation
  • Output voltage source and sink capability
  • PVIN, VOUT, IIN and IOUT and temperature reporting over PMBus
  • Over current protection in pulse-by-pulse mode
  • Output over voltage protection, Output under voltage protection, Over temperature protection with hysteresis
  • Remote sense amplifier with true differential voltage sensing


Vishay SiC45x

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