Monolithic Power Systems (MPS) MPQ2178 Synchronous Step-Down Converters

Monolithic Power Systems (MPS) MPQ2178 Synchronous Step-Down Converters

Monolithic Power Systems (MPS) MPQ2178 Synchronous Step-Down Converters are monolithic and switch-mode converters with internal built-in power MOSFETs. These converters achieve 2A of continuous output current across a 2.5V to 5.5V input voltage range with a good load and line regulation. The output voltage (VOUT) of the MPQ2178 synchronous step-down converters can be regulated to as low as 0.6V for the adjustable output version. These converters feature 1% Feedback (FB) accuracy, 2.4MHz switching frequency, fixed output options, 100% duty cycle, and external Soft Start (SS) control.

The MPQ2178 synchronous step-down converters use a Constant-On-Time (COT) control with input voltage feed-forward to stabilize the Switching Frequency (fSW) across the full input range. Typical applications include automotive infotainment, camera modules, key fobs, industrial supplies, and battery-powdered devices.


  • Designed for automotive applications:
    • 2.5V to 5.5V input operating voltage range
    • Up to 2A output current
    • 1% FB accuracy
    • -40°C to 150°C operating temperature range
  • Optimized for EMC/EMI:
    • 2.4MHz switching frequency
    • Forced Continuous Conduction Mode (FCCM) across full load range
    • MeshConnect flip-chip package
  • Optimized for board size and BOM:
    • Built-in internal power MOSFETs
    • Fixed output options
    • Integrated compensation network
  • High performance for improved thermals:
    • 70mΩ and 40mΩ internal power MOSFETs
  • Additional features:
    • EN for power sequencing
    • Power Good (PG)
    • 100% duty cycle
    • External SS control
    • Output discharge
    • Output Over-Voltage Protection (OVP)
    • Short-Circuit Protection (SCP) with hiccup mode
    • Available in a compact QFN-8 (1.5mm × 2mm) package
    • Available in a wettable flank package
    • Available in AEC-Q100 grade 1

Typical Application

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Mike is the founder and editor of, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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