Dual 1.2MHz, 800mA Synchronous Step-Down Converter

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Product Description

The MP2109 contains two independent 1.2MHz constant frequency, current mode, PWM step down converters. Each converter integrates a main switch and a synchronous rectifier for high efficiency without an external Schottky diode. The MP2109 is ideal for powering portable equipment that runs from a single cell Lithium-Ion (Li+) battery. Each converter can supply 800mA of load current from a 2.5V to 6V input voltage. The output voltage can be regulated as low as 0.6V. The MP2109 can also run at 100% duty cycle for low dropout applications.


Product Features

  • Up to 95% Efficiency
  • 1.2MHz Constant Switching Frequency
  • 800mA Load Current on Each Channel
  • 2.5V to 6V Input Voltage Range
  • Output Voltage as Low as 0.6V
  • 100% Duty Cycle in Dropout
  • Current Mode Control
  • Short Circuit Protection
  • Thermal Fault Protection
  • <0.1μA Shutdown Current
  • Internally Compensated
  • Space Saving 10-Pin QFN Package


  • fsw (max) (kHz)1200
  • Vin (min) (V)2.5
  • Vin (max) (V)6
  • Iout (max) (A)0.8
  • Isw Limit (typ) (A)1.3
  • Max Duty Cycle (%)1
  • Vfb (V)0.6
  • Iq (typ) (mA)0.44
  • Regulated Outputs2
  • Vout (max) (V)6
  • Vout (min) (V)0.6
  • GradeCatalog
  • PackageQFN-10 (3x3)
  • Control ModeCurrent Mode
  • Common FeaturesSynchronous Rectification
  • Special Features100% Duty Cycle

Reference Materials

Quality Policy, Certificates & Reliability Reports
All MPS parts are lead-free, halogen-free and adhere to the RoHS directive. See Environmental section for details.