1.5A, Synchronous DC Step-Down Converter  with VSEL Pin

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The MP2141Q is a monolithic, step-down, switch-mode converter with built-in, internal power MOSFETs. The MP2141Q achieves 1.5A of continuous output currents from a 2.3V to 5.5V input voltage with excellent load and line regulation.
The constant-on-time (COT) control scheme provides fast transient response and eases loop stabilization. Fault protections include cycle-by-cycle current limiting and thermal shutdown.
The MP2141Q is ideal for a wide range of applications including high performance DSPs, wireless power, portable and mobile devices, and other low-power systems.
The MP2141Q requires a minimal number of readily available, standard, external components and is available in an ultra-small SOT563 package.



  • PFM Quiescent Current: 20μA
  • EN for Power Sequencing
  • VSEL for PFM/PWM
  • Wide 2.3V to 5.5V Operating Input Range
  • Fixed Output Voltage: 0.61V/1.8V
  • Up to 1.5A of Output Current
  • 120mΩ and 80mΩ Internal Power MOSFET Switches
  • Output Discharging
  • Short-Circuit Protection (SCP) with Hiccup Mode
  • Stable with Low ESR Output Ceramic Capacitors
  • 100% Duty Cycle
  • Available in a SOT563 Package


  • fsw (max) (kHz)2200
  • Vin (min) (V)2.3
  • Vin (max) (V)5.5
  • Iout (max) (A)1.5
  • Isw Limit (typ) (A)2.7
  • Max Duty Cycle (%)1
  • Iq (typ) (mA)0.02
  • Regulated Outputs1
  • Vout (max) (V)1.8
  • Vout (min) (V)1.8
  • GradeCatalog
  • PackageSOT563
  • Control ModeCOT
  • Common FeaturesLight-Load Efficiency, Synchronous Rectification
  • Special Features100% Duty Cycle, Fixed Output, Output Discharge