1A, 16V, 1.4MHz Asynchronous Step-Down Converter



The MP2259 is a monolithic integrated step-down switch mode converter with an internal power MOSFET. It achieves 1A continuous output current over a wide input supply range with excellent load and line regulation. Current mode operation provides fast transient response and eases loop stabilization. Fault condition protection includes cycle¬-by-¬cycle current limiting and thermal shutdown. The MP2259 requires a minimum number of readily available standard external components. The MP2259 is available in TSOT23-6 and SOT23-6 packages.



  • 1A Output Current
  • 0.5Ω Internal Power MOSFET Switch
  • Stable with Low ESR Output Ceramic Capacitors
  • Up to 92% Efficiency
  • 0.1μA Shutdown Mode
  • Fixed 1.4MHz Frequency
  • Thermal Shutdown
  • Cycle-by-Cycle Over Current Protection
  • Wide 4.5V to 16V Operating Input Range
  • Output Adjustable from 0.81V to 14V
  • Available in TSOT23-6 and SOT23-6 Packages


  • fsw (max) (kHz)1400
  • 最小输入电压4.5
  • Vin (max) (V)16
  • Iout (max) (A)1
  • Isw Limit (typ) (A)1.8
  • Max Duty Cycle (%)0.85
  • Vfb (V)0.81
  • Iq (typ) (mA)1
  • 额定输出1
  • Vout (max) (V)14
  • Vout (min) (V)0.81
  • GradeCatalog
  • PackageSOT23-6, TSOT23-6
  • Control ModeCurrent Mode