2.7-6V Input, 2A, 1.2MHz Synchronous Step-Down Converter



The MP2127 is a fully integrated, internally compensated 1.2MHz fixed frequency PWM step-down converter. It is ideal for powering portable equipment that runs from a single cell Lithium-Ion (Li+) Battery, with an input range from 2.7V to 6V. The MP2127 can provide up to 2A of load current with output voltage as low as 0.8V. It can also operate at 100% duty cycle for low dropout applications. With peak current mode control and internal compensation, the MP2127 is stable with ceramic capacitors and small inductors. Fault condition protection includes cycle-by-cycle current limiting and thermal shutdown. MP2127 is available in the small 6-pin 3mmx3mm QFN package.



  • Output Adjustable from 0.8V to VIN
  • Up to 95% Efficiency
  • 100% Duty Cycle for Low Dropout Applications
  • Power Good Indicator Output
  • 1.2MHz Fixed Switching Frequency
  • Stable with Low ESR Output Ceramic Capacitors
  • Thermal Shutdown
  • Cycle-by-Cycle Over Current Protection
  • Short circuit protection
  • 2.7V-6V Input Operation Range
  • Available in 6-pin 3x3mm QFN


  • fsw (max) (kHz)1200
  • Vin (min) (V)2.7
  • Vin (max) (V)6
  • Iout (max) (A)2
  • Isw Limit (typ) (A)3
  • Max Duty Cycle (%)1
  • Vfb (V)0.8
  • Iq (typ) (mA)0.5
  • Regulated Outputs1
  • Vout (max) (V)6
  • Vout (min) (V)0.8
  • GradeCatalog
  • PackageQFN-6 (3x3)
  • Control ModeCurrent Mode
  • Common FeaturesPower Good, Synchronous Rectification
  • Special Features100% Duty Cycle