0.5A, 55V, 480kHz Step-Down Converter with AEC-Q100 qualification



The MPQ2459 is a monolithic, step-down, switch-mode converter with a built-in power MOSFET. It achieves a 0.5A peak output current over a wide input-supply range with excellent load and line regulation. Current mode operation provides a fast transient response and eases loop stabilization. Fault protections include cycle­by­cycle current limiting and thermal shutdown. The MPQ2459 requires a minimal number of readily-available, standard, external components. The MPQ2459 is available in a TSOT23-6 package.


  • Guaranteed Industrial/Automotive Temp Range Limits.
  • 0.5A Peak Output Current
  • 1O Internal Power MOSFET
  • Stable with Low-ESR Ceramic Output Capacitors
  • Up to 90% Efficiency
  • 0.1µA Shutdown Mode
  • Fixed 480kHz Frequency
  • Thermal Shutdown
  • Cycle-by-Cycle Over-Current Protection
  • Wide 4.5V-to-55V Input Operating Range
  • Output Adjustable from 0.81V to 0.95×VIN
  • Available in a TSOT23-6 Package
  • Available in AEC-Q100 Grade 1


  • fsw (max) (kHz)480
  • 最小输入电压4.5
  • Vin (max) (V)55
  • Iout (max) (A)0.5
  • Isw Limit (typ) (A)1.25
  • Max Duty Cycle (%)0.935
  • Vfb (V)0.812
  • Iq (typ) (mA)0.73
  • 额定输出1
  • Vout (max) (V)52
  • Vout (min) (V)0.81
  • PG
  • GradeAutomotive
  • PackageTSOT23-6