2.5A, 36V, Frequency Selectable Step-Down Converter with Smart USB Charging Port for Automotive, with Less than 1s Short-Circuit Recovery, AEC-Q100 Qualified

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Product Description

The MPQ4475M-AEC1 integrates a monolithic, step-down, switch-mode converter with a single USB current-limit switch and a charging port identification circuit. The MPQ4475M-AEC1 achieves 2.5A of continuous output current with excellent load and line regulation over a wide input supply range. The output of the USB switch is current-limited. The MPQ4475M-AEC1 provides a USB dedicated charging port (DCP), which supports Battery Charging Specification 1.2 (BC1.2), divider mode, and 1.2V/1.2V mode without the need of outside user interaction. The output voltage has programmable line drop compensation. Full protection features includes hiccup current limiting, output over-voltage protection (OVP), and thermal shutdown. The MPQ4475M-AEC1 requires a minimum number of readily available, standard, external components and is available in a QFN-25 (4mmx4mm) package.

Product Features

  • EMI Reduction Technique
  • Wide 7V to 36V Operating Input Voltage Range
  • Fixed 5V Output Voltage with Line Drop Compensation
  • Accurate USB Output Current Limit
  • 40mO/32mO Low RDS(ON) Internal Buck Power MOSFETs
  • 24mO Low RDS(ON) Internal USB Power MOSFET
  • 350kHz / 250kHz / 150kHz Frequency Selectable
  • Programmable Line Drop Compensation
  • Output Over-Voltage Protection (OVP)
  • Hiccup Current Limit
  • Supports DCP Scheme for BC1.2, Divider Mode, and 1.2V/1.2V Mode
  • ±8kV HBM ESD Rating for USB, DP, and DM Pins
  • Available in a QFN-25 (4mmx4mm) Package
  • Available in AEC-Q100 Grade 1
  • Less than 1s Short-Circuit Recovery (Hiccup Mode Off-Time)


  • fsw (max) (kHz)350
  • Vin (min) (V)7
  • Vin (max) (V)36
  • Iout (max) (A)2.5
  • Isw Limit (typ) (A)4
  • Max Duty Cycle (%)0.88
  • Iq (typ) (mA)1.6
  • Regulated Outputs1
  • Vout (max) (V)5
  • Vout (min) (V)5
  • mps_Status2
  • GradeAutomotive
  • PackageQFN-25 (4x4)
  • Control ModeCurrent Mode
  • Common FeaturesSynchronous Rectification
  • Special FeaturesEMI Reduction Technique, Fixed Output, Output Line Drop Compensation, Programmable Frequency, Supports DCP Scheme