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IC manufacturers Monolithic Power Systems

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Monolithic Power Systems EV28256EL-00A

21V, 3A 500kHz Synchronous Step-down Converter EV Board


TopologyBuck Converter
Input voltage4.5-21 V
Output 11.2 V / 3 A
IC revision1.0


The EV28256EL-00A is for demonstrating MPS’s MP28256, a high frequencysynchronous rectified step-down switch mode converter with built in internal power MOSFETs.MP28256 offers a very compact solution toachieve 3A continuous output current over a wide input supply range with excellent load and line regulation. The MP28256 operates at high efficiency over a wide output current load range.

Current mode operation provides fast transient response and eases loop stabilization. The full protection features include OCP and thermal shutdown.

The MP28256 requires a minimum number of readily available standard external components and comes in a space saving 3x4mm 14-pinQFN package.


  •  Wide 4.5V to 21V Operating Input Range
  •  0.6V Internal Reference with 2% Accuracy
  •  3A Output Current
  •  Low Rds(ON) Internal Power MOSFETs
  •  Fixed 500kHz Switching Frequency
  •  Frequency SYNC from 300kHz to 2MHz
  • External Clock
  •  External Soft Start
  •  OCP and Thermal Shutdown
  •  Available in 14-pin QFN3x4 Package

Typical applications

  • Cable Modems
  • DSL Modems
  • Set Top Boxes