Dual 1.5A, 1.2MHz Synchronous Step-Down Converter



The MP2125 is a fully integrated dual PWM step-down converter with built-in internal power MOSFETs. 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 MP2125 can provide up to 1.5A of load current with output voltage as low as 0.8V for each output. It can also operate at 100% duty cycle for low dropout applications. With peak current mode control and internal compensation, the MP2125 is stable with ceramic capacitors and small inductors. Fault condition protection includes cycle-by-cycle current limiting and thermal shutdown. MP2125 is available in the small 14-pin 3mmx4mm QFN package.



  • 2.7V-6V Input Operation Range
  • Each Output Adjustable from 0.8V to VIN
  • 1µA Shutdown Current
  • Up to 92% Efficiency
  • 100% Duty Cycle for Low Dropout Applications
  • Fixed 1.2MHz Frequency
  • Stable with Low ESR Output Ceramic Capacitors
  • Cycle-by-Cycle Over Current Protection
  • Thermal Shutdown
  • Short Circuit Protection
  • Available in a 14-pin 3x4mm QFN Package


  • fsw (max) (kHz)1200
  • 最小输入电压2.7
  • Vin (max) (V)6
  • Iout (max) (A)1.5
  • Isw Limit (typ) (A)3
  • Max Duty Cycle (%)1
  • Vfb (V)0.8
  • Iq (typ) (mA)0.6
  • 额定输出2
  • Vout (max) (V)6
  • Vout (min) (V)0.8
  • GradeCatalog
  • PackageQFN-14 (3x4)
  • Control ModeCurrent Mode
  • Common FeaturesSynchronous Rectification
  • Special Features100% 占空比