Integrated 100V Load Dump Protection 2A 100kHz Step-Down Regulator with Programmable Output Current



The MP2499 is a monolithic step-down switch mode converter with a programmable output current limit and an integrated input over-voltage protection switch. It achieves 2.0A 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 cycle¬-by¬-cycle current limiting and thermal shutdown. The MP2499 can survive high-voltage transients such as those found in automotive and industrial applications. The MP2499 requires a minimum number of readily available standard external components. The MP2499 is available in a 16-pin SOIC package.



  • Replaces External Transorb
  • Supports 12V/24V Systems
  • Input Surge Protection Up to 100V
  • Programmable Output Current up to 2.0A
  • Output Adjustable
  • Fixed 100kHz Frequency
  • 0.25Ω Internal Power MOSFET Switch
  • Stable with Low ESR Output Ceramic Capacitors
  • 92% Efficiency @ 500mA (Vo=5V)
  • Thermal Shutdown
  • Cycle-by-Cycle Over Current Protection
  • Available in a 16-Pin SOIC Package


  • fsw (max) (kHz)100
  • 最小输入电压4.5
  • Vin (max) (V)55
  • Iout (max) (A)2
  • Isw Limit (typ) (A)3
  • Vfb (V)0.8
  • Iq (typ) (mA)0.5
  • 额定输出1
  • Vout (max) (V)5
  • Vout (min) (V)3.3
  • GradeCatalog
  • PackageSOIC-16
  • Control ModeCurrent Mode
  • Common FeaturesExternal Soft Start