2A, 55V, 100KHz Step-Down Converter with Programmable Output Current Limit



The MP2492 is a monolithic step-down switch mode converter with a programmable output current limit. It achieves 2A continuous output current over a wide input supply range with excellent load and line regulation. The maximum output current can be programmed by sensing current through the inductor DC resistance (DCR) or an accurate sense resistor. MP2492 achieves low EMI signature with well controlled switching edges. Fault condition protection includes cycle¬-by-¬cycle current limiting, and thermal shutdown. The MP2492 requires a minimum number of readily available standard external components. The MP2492 is available in QFN10 (3mm x 3mm) and SOIC8E packages.


  • Wide 4.5V to 55V Operating Input Range
  • Programmable up to 2A Output Current
  • Output Adjustable from 0.8V to 15V
  • Programmable Output Current Limit Without Power Loss
  • 0.25Ω Internal Power MOSFET Switch
  • Stable with Low ESR Output Ceramic Capacitors
  • Fixed 100kHz Frequency
  • Low EMI Signature
  • Thermal Shutdown
  • Cycle-by-Cycle Over Current Protection
  • Available in QFN10 and SOIC8E Packages


  • fsw (max) (kHz)100
  • Vin (min) (V)4.5
  • Vin (max) (V)55
  • Iout (max) (A)2
  • Isw Limit (typ) (A)3.5
  • Max Duty Cycle (%)0.89
  • Vfb (V)0.8
  • Iq (typ) (mA)0.5
  • Regulated Outputs1
  • Vout (max) (V)15
  • Vout (min) (V)0.8
  • PGNo
  • SSExternal
  • GradeCatalog
  • PackageQFN-10 (3x3)
  • Control ModeCurrent Mode
  • Common FeaturesExternal Soft Start, Power Good