36V, 6A, Step-Down Converter with Dual USB Charging Ports Supporting Type-C 5V @ 3A DFP Mode and BC1.2 CDP Mode for Automotive, AEC-Q100 Qualified
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The MPQ4485 integrates a monolithic, step-down, switch-mode converter with two USB current-limit switches and charging port identification circuitry. The MPQ4485 achieves 6A of output current with excellent load and line regulation over a wide input supply range.
The output of the USB switch is current-limited. USB1 supports DCP schemes for battery charging specification (BC1.2), divider mode, 1.2V/1.2V mode, and USB Type-C 5V @ 3A DFP mode, eliminating the need for outside user interaction. USB2 supports DCP and CDP schemes.
Full protection features include hiccup current limiting, output over-voltage protection (OVP), and thermal shutdown.
The MPQ4485 requires a minimal number of readily available, standard, external components and is available in a QFN-26 (5mmx5mm) package.


  • Wide 6V to 36V Operating Input Voltage Range
  • Fixed 5.17V Output Voltage
  • 90mV Line Drop Compensation
  • Accurate USB1/USB2 Output Current Limit 
  • 18mΩ/15mΩ Low RDS(ON) Internal Buck Power MOSFETs 
  • 18mΩ/18mΩ Low RDS(ON) Internal USB1/USB2 Power MOSFETs
  • 450kHz Switching Frequency 
  • Forced CCM Operation 
  • Load Shedding versus Temperature for MPQ4485GU-LS-AEC1
  • USB Output Over-Voltage Protection (OVP)
  • Fast Over-Current Response for USB Switch
  • Hiccup Current Limit
  • Supports DCP Schemes for BC1.2, Divider Mode, and 1.2V/1.2V Mode
  • USB1 Supports USB Type-C 5V @ 3A Mode, USB2 Supports CDP Mode
  • ±8kV HBM ESD Rating for USB, DP, DM, DP_OUT, and DM_OUT
  • Available in a QFN-26 (5mmx5mm) Package
  • Available in AEC-Q100 Grade 1


  • fsw (max) (kHz)450
  • Vin (min) (V)6
  • Vin (max) (V)36
  • Iout (max) (A)6
  • Isw Limit (typ) (A)12
  • Max Duty Cycle (%)0.95
  • Iq (typ) (mA)1
  • Regulated Outputs3
  • Vout (max) (V)5.17
  • Vout (min) (V)5.17
  • PGNo
  • SS内部
  • 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)6.0
  • Internal LDO0
  • GradeAutomotive
  • PackageQFN-26 (5x5)
  • Control ModeCurrent Mode
  • Common FeaturesForced CCM, Synchronous Rectification
  • Special FeaturesFixed Output Voltage Options, Forced CCM, Load Shedding, Output Line Drop Compensation, Supports CDP Mode, Supports DCP Scheme, Supports USB Type-C 5V @ 3A DFP Mode, USB Output Discharge