Vishay SiC931 Synchronous Buck Regulator Module

20A DC-DC regulator module in new space-saving package design

Vishay’s new SiC931, a synchronous buck regulator module which is capable of supplying a continuous 20A output, features an innovative microBRICK™ package design which is less than half the volume of equivalent competing modules. Its board footprint is also 30% smaller than that of competitors.


Intended as a power supply for microprocessors, DSPs, FGPAs or ASICs, the SiC931 is a complete power system including power MOSFETs and inductor. Its power stage supplies a maximum continuous current of 20A at a switching frequency of up to 2MHz. Requiring few peripheral components, it is easy to design into an end product’s power system.


The SiC931 module produces an adjustable output voltage between 0.6V and 5.5V from a 4.5V-18V input range. Its architecture supports an ultra-fast transient response with minimal output capacitance and tight ripple regulation at light loads. The device is internally compensated, and no external ESR network is required to maintain loop stability.


The SiC931 gives the user a choice of four programmable switching frequencies: 600kHz, 1MHz, 1.5MHz and 2MHz. Its mode of operation is also programmable, between continuous-conduction and power-saving modes.


The module implements an adjustable soft-start process, and applies an adjustable cycle-by-cycle current limit. It also incorporates a power-saving scheme which increases light-load efficiency.


  • Output-voltage tracking and sequencing with pre-bias start up
  • ±1% output-voltage accuracy from -40°C to 125°C
  • Package dimensions: 10.6mm x 6.5mm x 3.0mm
  • Output over-voltage protection
  • Output under-voltage and short-circuit protection
  • Power Good flag
  • Over-temperature protection


  • FPGA power supplies
  • Point-of-load power supplies
  • Industrial equipment
  • Automation

Evaluation Board

Board part number: SIC931EVB-A

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