36V, 0.6A, Low Iq Step-Down Converter with PG and External Soft Start



The MP2454 is a frequency-programmable (350kHz to 2.3MHz), step-down switching regulator with an integrated internal high-side, high-voltage power MOSFET. It outputs efficiently up to 0.6A and has current-mode control for fast loop response. 
The wide 3.3V to 36V input range accommodates a variety of step-down applications in automotive-input environments. A 3.5μA shutdown mode quiescent current allows for use in battery-powered applications. Also, the device has a high duty cycle and low drop-out mode for automotive cold-crank conditions. 
The MP2454 achieves high-power conversion efficiency over a wide load range by scaling down the switching frequency at light-load conditions to reduce both switching and gate driving losses. 
Frequency foldback prevents inductor current runaway during start-up and short circuit. Thermal shutdown provides reliable, fault-tolerant operation. An open-drain power good (PG) signal indicates when the output is within its nominal voltage.
The MP2454 is available in MSOP-10 EP and QFN-10 (3mm x 3mm) packages.



  • 60μA Operating Quiescent Current
  • Wide 3.3V to 36V Operating Input Range
  • 200mΩ Internal Power MOSFET
  • Up to 2.3MHz Programmable Switching Frequency
  • Stable with Ceramic Output Capacitors
  • Internal Compensation
  • External Soft Start
  • > 90% Efficiency
  • Low Dropout Operation for Cold Crank
  • 3.5μA Low Shutdown Supply Current
  • Synchronization to External Clock
  • Power Good Output
  • Programmable Power Good Delay Time
  • MSOP-10 EP and QFN-10 (3mm x 3mm) Packages


  • fsw (max) (kHz)2300
  • Vin (min) (V)3.3
  • Vin (max) (V)36
  • Iout (max) (A)0.6
  • Isw Limit (typ) (A)1.8
  • Vfb (typ) (V)0.8
  • Iq (typ) (mA)0.06
  • Regulated Outputs1
  • GradeCatalog
  • PackageQFN-10 (3x3)
  • Control ModeCurrent Mode
  • Common FeaturesExternal Soft Start, Power Good
  • Special FeaturesProgrammable Frequency