Monolithic Power Systems – MP4433: 36V, 3A Synchronous Step-Down Converter

The MP4433 is a frequency-programmable (350kHz to 2.5MHz), synchronous, step-down switching regulator with integrate high-side and low-side power MOSFETs. It provides up to 3A of highly efficient output current with current mode control for fast loop response. The wide 3.3V to 36V input range accommodates a variety of step-down applications in automotive input environments and is ideal for battery-powered applications due to its extremely low quiescent current.


  • 3.3V to 36V operating input range
  • 1μA shutdown mode current
  • 350kHz to 2.5MHz programmable switching frequency
  • Synchronize to external clock, selectable in-phase or 180° out-of-phase
  • Programmable soft start time
  • Low dropout mode
  • 3A continuous output current
  • 10μA sleep mode quiescent current
  • 3.3V, 3.8V, 5V fixed output options
  • Power good indicator
  • Selectable forced CCM or AAM
  • 3 x 4mm QFN-16 package