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Monolithic Power Systems (MPS) MPQ4323 42V Synchronous Step-Down Converters

Monolithic Power Systems (MPS) MPQ4323 42V Synchronous Step-Down Converters are frequency-configurable (350kHz to 2.5MHz) step-down switching regulators. These devices feature integrated internal high-side and low-side power MOSFETs. The MPQ4323 regulators provide 3A of highly efficient output current with peak current mode control. The wide 3.3V to 36V input voltage range and 42V load dump tolerance accommodate a variety of step-down applications in automotive input environments. The MPQ4323 synchronous step-down converters offer a 1μA shutdown current (ISD) for battery-powered applications. 

The MPQ4323-AEC1 step-down converters are available in QFN-12 (2mm x 3mm) packages, whereas the MPQ4323C-AEC1 converters come in QFN-12 (3mm x 4mm), and MPQ4323M-AEC1 converters are available in QFN-12L (3.5mm x 3.5mm) packages. Typical applications include automotive infotainment, automotive clusters, Advanced Driver Assistance Systems (ADAS), and industrial power systems.

Features

  • Designed for automotive applications
    • Survives 42V load dump
    • Supports 3.1V cold crank
    • 3A continuous output current
    • Wide 3V to 36V operating vin range
    • -40°C to 150°C operating junction temperature range (150°C maximum)
  • Increases battery life
    • 1μA shutdown current (ISD)
    • 20μA sleep mode quiescent current
    • Advanced asynchronous modulation (AAM) mode increases efficiency under light loads
  • High performance for improved thermals
    • Integrated 70mω high-side and 50mω low-side MOSFETs
    • 65ns minimum on time and 50ns minimum off time
  • Optimized for EMC/EMI reduction
    • Frequency spread spectrum (FSS) modulation
    • Symmetric VIN pinout
    • ISPR25 Class 5 compliant
    • 350KHz to 2.5MHz configurable switching frequency (fSW)
    • MeshConnect™ flip-chip package
  • Additional features
    • Power good (PG) output
    • Low-dropout (LDO) mode
    • Over-current protection (OCP) with hiccup mode
    • Available in QFN-12 (2mm x 3mm), QFN-12 (3mm x 4mm), or QFN-12L (3.5mm x 3.5mm) packages
    • Available in a wettable flank package
    • Available in AEC-Q100 Grade 1

Applications

  • Automotive infotainment systems
  • Automotive clusters
  • Advanced driver assistance systems
  • Industrial power systems

TYPICAL APPLICATION

Application Circuit Diagram - Monolithic Power Systems (MPS) MPQ4323 42V Synchronous Step-Down Converters

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Monolithic Power Systems (MPS) MPQ4323 42V Synchronous Step-Down Converters