3A, 5.5V, 2MHz, High Efficiency, COT Synchronous Step Down Converter with PG and Auto Discharge

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Product Description

The MP2143H is a monolithic, step-down, switch-mode converter with internal power MOSFETs. It can achieve up to 3A continuous output current from a 2.5V to 5.5V input voltage with excellent load and line regulation. The output voltage can be regulated as low as 0.6V.
Constant-on-time control provides fast transient response and eases loop stabilization. Fault-condition protections include cycle-by-cycle current limiting and thermal shutdown. 
The MP2143H is available in small QFN-10 package and requires only a minimal number of readily-available standard external components.
The MP2143H is ideal for a wide range of applications including high-performance DSPs, FPGAs, and portable instruments.


Product Features

  • Wide 2.5V to 5.5V Operating Input Range
  • Output Voltage as Low as 0.6V
  • 100% Duty Cycle in Dropout
  • Up to 3A Output Current
  • 80mΩ and 40mΩ Internal Power MOSFET Switches
  • Default 2.0MHz 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 QFN-10 (2mmx3mm) Package


  • fsw (max) (kHz)2000
  • Vin (min) (V)2.5
  • Vin (max) (V)5.5
  • Iout (max) (A)3
  • Isw Limit (typ) (A)4.8
  • Max Duty Cycle (%)1
  • Vfb (V)0.6
  • Iq (typ) (mA)0.55
  • Regulated Outputs1
  • Vout (max) (V)5
  • Vout (min) (V)0.6
  • GradeCatalog
  • PackageQFN-10 (2x3)
  • Control ModeCOT
  • Common FeaturesPower Good, Synchronous Rectification
  • Special Features100% Duty Cycle, Soft Stop
Quality Policy, Certificates & Reliability Reports
All MPS parts are lead-free, halogen-free and adhere to the RoHS directive. See Environmental section for details.