0.6A, 5.5V, 2.2MHz, Synchronous Step-down Converter with 11µA IQ in Ultra-small 1x1.5mm QFN Package

Talk to an Engineer or get a Quote

Product Description

The MP21600 is a monolithic, step-down, switch-mode converter with built-in, internal power MOSFETs. The MP21600 achieves 0.6A of continuous output current from a 2.3V to 5.5V input voltage range with excellent load and line regulation. The output voltage can be regulated as low as 0.6V.
The constant-on-time (COT) control scheme provides fast transient response and eases loop stabilization. Fault protections include cycle-by-cycle current limiting and thermal shutdown. 
The MP21600 is ideal for a wide range of applications, including high-performance DSPs, wireless power, portable and mobile devices, and other low-power systems. 
The MP21600 requires a minimal number of readily available, standard, external components is available in an ultra-small QFN-6 (1.0mmx1.5mm) package.


Product Features

  • Low IQ: 11μA
  • 2.4MHz Switching Frequency
  • Enable (EN) Pin for Power Sequencing
  • Wide 2.3V to 5.5V Operating Input Range
  • Output Adjustable from 0.6V
  • Up to 0.6A Output Current
  • 120mΩ and 80mΩ Internal Power MOSFET Switches
  • Output Discharge
  • 100% Duty Cycle
  • Short-Circuit Protection (SCP) with Hiccup Mode
  • Stable with Low ESR Output Ceramic Capacitors
  • Available in a QFN-6 (1.0mmx1.5mm) Package


  • fsw (max) (kHz)2200
  • Vin (min) (V)2.3
  • Vin (max) (V)5.5
  • Iout (max) (A)0.6
  • Isw Limit (typ) (A)1.3
  • Max Duty Cycle (%)1
  • Vfb (V)0.6
  • Iq (typ) (mA)0.011
  • Regulated Outputs1
  • Vout (max) (V)5.5
  • Vout (min) (V)0.6
  • GradeCatalog
  • PackageQFN-6 (1.0x1.5)
  • Control ModeCOT
  • Common FeaturesLight-Load Efficiency, Synchronous Rectification
  • Special Features100% Duty Cycle, Output Discharge

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.