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Monolithic Power Systems (MPS) MPQ4314 Synchronous Step-Down Converters

Monolithic Power Systems (MPS) MPQ4314 Synchronous Step-Down Converters offer configurable-frequency with integrated internal high-side and low-side power MOSFETs (HS-FET and LS-FET, respectively). The MPQ4314 delivers up to 4A highly efficient output current (IOUT) with current mode control for fast loop response. The devices utilize a wide 3.3V to 45V input voltage (VIN) range to accommodate a variety of step-down applications in automotive input environments. A 1.7μA shutdown mode quiescent current enables the MPQ4314 to be used in battery-powered applications.

The MPS MPQ4314 Synchronous Step-Down Converters supply thermal shutdown for a reliable, fault-tolerant operation and frequency foldback to prevent inductor current runaway during start-up. A high-duty cycle and low-dropout mode are also furnished for automotive cold crank conditions.

The MPQ4314 is housed in a QFN-20 (4mm x 4mm) package.

Features

  • Wide 3.3V to 45V operating input voltage (VIN) range
  • 4A Continuous output current (IOUT)
  • 1.7μA Low shutdown supply current (ISHDN)
  • 18μA Sleep mode quiescent current (IQ)
  • Internal 48mΩ High-Side MOSFET (HSFET) and 20mΩ Low-Side MOSFET (LSFET)
  • 350kHz to 1000kHz Programmable Switching Frequency (fSW) for car battery applications
  • Synchronize to an external clock
  • Out-of-phase synchronized clock output
  • 3.3V Fixed output options
  • Frequency Spread Spectrum (FSS) for low EMI
  • Symmetric VIN for low EMI
  • Power Good (PG) output
  • External Soft Start (SS)
  • 100ns Minimum on time
  • Selectable Advanced Asynchronous Modulation (AAM) Mode or Forced Continuous Conduction Mode (FCCM)
  • Low-dropout mode
  • Hiccup Over-Current Protection (OCP)
  • Available in a QFN-20 (4mm x 4mm) package
  • Available in a wettable flank package
  • Available in AEC-Q100 Grade 1

Applications

  • Automotive infotainment
  • Automotive clusters
  • Advanced Driver Assistance Systems (ADAS)
  • Industrial power systems

Typical Application

Application Circuit Diagram - Monolithic Power Systems (MPS) MPQ4314 Synchronous Step-Down Converters

Efficiency vs. Load Current

Performance Graph - Monolithic Power Systems (MPS) MPQ4314 Synchronous Step-Down Converters

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Monolithic Power Systems (MPS) MPQ4314 Synchronous Step-Down Converters