Dual 3A USB DCP Charger

Industry's Smallest Dual 3A Port Automotive DCP Charger

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The MAX20047 is an automotive-grade, low-cost, small-footprint dual-port charger IC designed for automotive charging applications. It combines a fully synchronous 6A step-down buck converter with integrated high-side and low-side FETs capable of operating with input voltages from 3.5V to 36V and delivering 5.2V output voltage. The IC features integrated iPod®/iPhone®1.0A and iPad® 2.1A dedicated charging modes.

The IC delivers up to 3A of charging current with 93% efficiency per port through integrated switches with programmable current limit and thermal foldback control. The buck converter switching frequency is programmable from 0.4MHz to 2.2MHz. Short-to-ground protection and overcurrent protection are also provided on the protected HVBUS outputs to protect the internal BUS power rail from an overcurrent fault. The MAX20047 offers short-to-battery up to +18V and can also be ordered with spread-spectrum operation to reduce EMI.

iPod, iPhone, and iPad are registered trademarks of Apple Inc..

Design Solution: Beat the Heat: Build a Compact, Multi-Standard Dual USB Charger ›

MAX20047: Functional Diagram MAX20047: Functional Diagram Enlarge+

Key Features

  • Operating VIN Range of 3.5V to 36V
  • 40V Load-Dump Protection
  • Synchronous DC-DC Converter with Integrated FETs
  • 93% Charge Efficiency at 3A Charging
  • 0.4MHz to 2.2MHz Programmable Switching Frequency by External Pin Settings
  • Spread-Spectrum Operation
  • Fixed 8ms Internal Soft-Start
  • 5.20V Output
  • 99% Duty-Cycle Operation with Low Dropout
  • ±2% Output-Voltage Accuracy
  • Input System Overvoltage and Short-Circuit Protection
  • Accurate SRC_DMOS Current Limiting with Minimal Voltage Drop
    • Low RON 15mΩ Dual USB Power Switches
    • Adjustable SRC_DMOS Current Limit by External Pin Settings
    • Integrated Current Sensing
  • Thermal Regulation and Thermal Shutdown
  • Dual Autonomous Battery-Charging Ports with Portable Device Detection
    • Integrated Apple® 2.4A, 2.1A, 1.0A Detection
    • Integrated Samsung® Detection
    • Integrated DCP Detection
  • Robust for the Automotive Environment
    • Short-to-Battery and Short-to-Ground Protection on Protected SRC_DMOS Output
    • Short-to-Battery and Short-to-PV Protection on Protected HVDP1, HVDM1, HVDP2, and HVDM2 Inputs
    • Tested to ISO 10605 and IEC 61000-4-2 ESD Standards
    • 20-Pin (5.0mm x 3.5mm) FC2-QFN Package
    • -40°C to +125°C Operating Temperature Range
    • AEC-Q100 Qualified


  • Automotive Cigarette Lighter Adapters
  • Power Supply for Linear Chargers
  • USB Dedicated Charging Ports (DCP)

See parametric specs for USB Host Adapter Emulator (23)

Part NumberSupported Charging ConfigurationsSupported USB Battery Charging SpecificationCharging ModesCDP EmulationRemote Wake-Up SupportVBUS Reset Time
Apple 0.5A
Apple 1.0A
Apple 2.1A
China YD/T 1591-2009
Samsung Galaxy Tablet 2A
USB Dedicated Charger
Auto Detection with Apple 1A
Auto Detection with Apple 2A
Forced Dedicated Charger
Samsung Galaxy Tablet 2A

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX20047EVKIT: Evaluation Kit for the MAX20047
Request Reliability Report for: MAX20047 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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