2A, 5.5V, 1.2MHz, 40μA IQ, COT Synchronous Step Down Switcher



The MP2144 is a monolithic, step-down, switch-mode converter with internal power MOSFETs. It can achieve up to 2A continuous output current from a 2.5V–to-5.5V input voltage with excellent load and line regulation. The output voltage can be regulated to as low as 0.6V.  The constant-on-time control scheme provides fast transient response and eases loop stabilization. Fault condition protections include cycle-by-cycle current limiting and thermal shutdown.  The MP2144 is available in small TSOT23-8 package and requires only a minimal number of readily available standard external components.  The MP2144 is ideal for a wide range of applications including high-performance DSPs, FPGAs, smartphones, portable instruments, and DVD drivers.



  • Wide 2.5V-to-5.5V Operating Input Range
  • Output Voltage as Low as 0.6V
  • 100% Duty Cycle in Dropout
  • Up to 2A Output Current
  • Low IQ: 40µA
  • 90mΩ and 60mΩ Internal Power MOSFET Switches
  • Default 1.2MHz Switching Frequency
  • EN and Power-Good for Power Sequencing
  • Cycle-by-Cycle Over-Current Protection
  • Auto Discharge at Power-Off
  • Short-Circuit Protect with Hiccup Mode
  • Stable with Low-ESR Output Ceramic Capacitors
  • Available in a TSOT23-8 Package


  • fsw (max) (kHz)1200
  • Vin (min) (V)2.5
  • Vin (max) (V)5.5
  • Iout (max) (A)2
  • Isw Limit (typ) (A)3.8
  • Max Duty Cycle (%)1
  • Vfb (V)0.6
  • Iq (typ) (mA)0.04
  • Regulated Outputs1
  • Vout (max) (V)5
  • Vout (min) (V)0.6
  • GradeCatalog
  • PackageTSOT23-8
  • Control ModeCOT
  • Common FeaturesPower Good, Synchronous Rectification
  • Special Features100% Duty Cycle, Soft Stop