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 › Applications * Automotive Cigarette Lighter Adapters * Power Supply for Linear Chargers * USB Dedicated Charging Ports (DCP) * 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 SRCDMOS Current Limiting with Minimal Voltage Drop * Low RON 15mΩ Dual USB Power Switches * Adjustable SRCDMOS 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 SRCDMOS 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