1.5A, 36V, 700KHz Step-Down Converter with Programmable Output Current Limit



The MPQ2490 is a monolithic step-down switch mode converter with programmable output current limit. It achieves 1.5A 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. Fault condition protection includes cycle­by­cycle current limiting and thermal shutdown. The MPQ2490 requires a minimum number of readily available standard external components. The MPQ2490 is available in  QFN (3x3mm) package.



  • Wide 4.5V to 36V Operating Input Range
  • Programmable up to 1.5A 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
  • 95% Efficiency @ 500mA (Vo=5V)
  • Fixed 700kHz Frequency
  • Thermal Shutdown
  • Cycle-by-Cycle Over Current Protection
  • Available in QFN10 Package


  • fsw (max) (kHz)700
  • 最小输入电压4.5
  • Vin (max) (V)36
  • Iout (max) (A)1.5
  • Isw Limit (typ) (A)4.2
  • Vfb (V)0.805
  • Iq (typ) (mA)0.5
  • 额定输出1
  • Vout (max) (V)15
  • Vout (min) (V)0.8
  • GradeIndustrial
  • PackageSOIC-8
  • Control ModeCurrent Mode
  • Common FeaturesExternal Soft Start, Power Good