DC to DC Converter by Monolithic Power Systems

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MPQ4346GLE-33-AEC1-Z Image

The MPQ4346GLE-33-AEC1-Z from Monolithic Power Systems is an Automotive Qualified Synchronous Buck DC-DC Converter that converts an input voltage of 3.3 - 45 V to an output voltage of 3.3 V. This DC-DC converter has a switching frequency of 350 - 1000 kHz. It includes control logic, low-side and high-side power MOSFETs, an internal clock oscillator with support for an external clock, a voltage regulator, voltage reference, a bootstrap (BST) regulator, and protection circuits. This converter works in two different modes – forced continuous conduction mode (FCCM) and asynchronous advanced modulation (AAM), to control switching frequency, gate driver losses, and output ripples, thereby improving efficiency under light-load and no-load conditions. It uses the frequency foldback technique to help prevent the runaway of inductor current and supports automotive cold-crank conditions with high-duty cycle and low dropout mode.

The DC-DC converter has undergone CISPR25 Class-5 compliance test procedures, provides switching frequency configurability, consists of a symmetric input voltage pin-out configuration, and uses frequency spread spectrum (FSS) modulation that results in electromagnetic interference (EMI) reduction and optimization. It integrates over-current protection (OCP) and thermal shutdown to prevent short-circuit-related damages and offer fault tolerance. This AEC-Q100 Grade 1-qualified converter is available in a MeshConnect flip-chip surface-mount package that measures 3 x 4 mm and is ideal for automotive infotainment, automotive clusters, industrial power systems, and advanced driver assistance systems (ADAS) applications.

Product Specifications

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Product Details

  • Part Number
  • Manufacturer
    Monolithic Power Systems
  • Description
    Automotive Qualified Synchronous Buck DC-DC Converter


  • Type
    Buck/Step down
  • Configuration
  • Input Voltage
    3.3 to 45 V
  • Output Voltage 1
    3.3 V
  • Output Power
    4.28 W
  • Operating Temperature
    -40 to 150 Degree C
  • Industry
  • Package Type
    Surface Mount
  • Package
  • Application
    Automotive Clusters, Automotive Infotainment, Advanced Driver Assistance Systems (ADAS), Industrial Power Systems
  • Dimension
    3 mm x 4 mm
  • Frequency
    1000 kHz
  • Storage Temperature
    -65 to 150 Degree C

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