36V, 3A, Step-Down Converter with Programmable Frequency and Single USB Charging Port Supporting EN_USB, Fault Indication for Automotive, AEC-Q100 Qualified

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Product Description

The MPQ4481 integrates a monolithic, step-down, switch-mode converter with a single USB current-limit switch and Type-C 5V @ 3A mode configuration channel for the USB port. The MPQ4481 achieves 3A of output current with excellent load and line regulation over a wide input supply range.
The output of the USB switch is current-limited. The USB port supports DCP schemes for battery charging specification (BC1.2), divider mode, 1.2V/1.2V mode, and USB Type-C 5V @ 3A DFP mode without the need for outside user interaction.
Full protection features include hiccup current limiting, output over-voltage protection (OVP), and thermal shutdown.
The MPQ4481 requires a minimal number of readily available, standard, external components and is available in a QFN-26 (5mmx5mm) package.

Product Features

  • Supports DCP Schemes for BC1.2, Divider Mode, and 1.2V/1.2V Mode
  • Supports USB Type-C 5V @ 3A DFP Mode
  • Wide 6V to 36V Operating Input Range
  • Selectable VOUT: 5.1V, 5.17V, and 5.3V
  • Programmable Line Drop Compensation 
  • Accurate USB Output Current Limit 
  • Low Dropout Mode
  • 25mΩ/20mΩ Low RDS(ON) Internal Buck Power MOSFETs
  • 15mΩ Low RDS(ON) Internal USB Power MOSFETs
  • Up to 2.2MHz Operation Frequency
  • Forced Continuous Conduction Mode (CCM) Operation 
  • Load Shedding versus Temperature 
  • EN Control for USB
  • Fault Indication for USB
  • ±8kV HBM ESD Rating for USB, DP, DM
  • Available in a QFN-26 (5mmx5mm) Package
  • Available in AEC-Q100 Grade 1


  • fsw (max) (kHz)2200
  • Vin (min) (V)6
  • Vin (max) (V)36
  • Iout (max) (A)3
  • Isw Limit (typ) (A)6.5
  • Max Duty Cycle (%)0.95
  • Iq (typ) (mA)1
  • Regulated Outputs1
  • Vout (max) (V)5.3
  • Vout (min) (V)5.1
  • Step-Down DC/DC Controller0
  • Step-Down DC/DC Converter1
  • Step-Up DC/DC Controller0
  • Step-Up DC/DC Converter0
  • Step-Down Converter Current (A)3.0
  • Internal LDO0
  • GradeAutomotive
  • PackageQFN-26 (5x5)
  • Control ModeCurrent Mode
  • Common FeaturesForced CCM, Synchronous Rectification
  • Special FeaturesOutput Line Drop Compensation, Programmable Frequency, Supports DCP Scheme