EVALUATION KIT AVAILABLE Click here to ask about the production status of specific part numbers. MAX16984A Automotive High-Current Step-Down Converter with USB Protection/Host Charger Adapter Emulator General Description Benefits and Features The MAX16984A combines a 5V automotive-grade step- Integrated DC-DC and USB Host Charge Emulator down converter capable of driving up to 3.0A, a USB host Enables 1-Chip Solution Directly from Car Battery to charger adapter emulator, and USB protection switches Portable Device for automotive USB host applications. The USB protection 4.5V to 28V (40V Load Dump) Operating Voltage switches provide high-ESD, short-circuit protection and 5V, 3.0A Output Current Capability feature integrated host-charger port-detection circuitry ad- Low-Q Current Skip and Shutdown Modes hering to the USB 2.0 BC 1.2 Battery Charging Specifica- Soft-Start Reduces Inrush Current tion, Samsung and Chinese Telecommunication Indus- Low-Noise Features Prevent Interference with AM try Standard YD/T 1591-2009. They also include circuit- Band and Portable Devices ry for Samsung 2.0A, iPod/iPhone/iPad 2.4A dedicat- Fixed-Frequency 310kHz to 2.2MHz Operation ed charging modes. The HVD+ and HVD- ESD protection Forced-PWM Option at No Load features include protection to 15kV Air/8kV Contact on Spread Spectrum for EMI Reduction the HVD+ and HVD- outputs to the IEC 61000-4-2 model SYNC Input/Output for Frequency Parking and 330, 330pF ISO model. Optimal USB Power and Communication for Portable The high-efficiency step-down DC-DC converter operates Devices from a voltage up to 28V and is protected from load dump User-Adjustable Voltage Gain Adjusts Output transients up to 40V. The device is optimized for high-fre- Between 5V and 7V for Cable Compensation 2 quency operation and includes I C or resistor-programma- 5% Accuracy User-Adjustable USB Current Limit ble frequency selection from 310kHz to 2.2MHz to allow 4 USB 2.0 1GHz Data Switches optimization of efficiency, noise, and board space based Integrated Samsung/iPod/iPhone/iPad Charge- on application requirements. The fully synchronous DC- Detection Termination Resistors DC converter integrates high-side and low-side MOSFETs Supports USB BC1.2 Charging Downstream Port with an external SYNC input/output, and can be config- (CDP) and Dedicated Charging Port (DCP) Modes ured for spread-spectrum operation. Skip mode is avail- Supports Chinese Telecommunication Industry able in light/no-load conditions to minimize quiescent cur- Standard YD/T 1591-2009 rent. The converter can deliver up to 3A of continuous cur- Compatible with USB On-the-Go Specification rent at 105C. The MAX16984A has an integrated spread- High-Speed Pass-Through Mode (SDP) spectrum oscillator to improve EMI performance. Robust Design Keeps Vehicle System and Portable The MAX16984A also includes a USB load current-sense Devices Safe in Automotive Environment amplifier and configurable feedback adjustment circuit de- Short-to-Battery Protection on DC-DC Converter signed to provide automatic USB voltage adjustment to Short-to-Battery Protection on USB Pins compensate for voltage drops in captive cables associat- 15kV Air/8kV Contact ISO 10605* ed with automotive applications. The MAX16984A limits 15kV Air/8kV Contact IEC 61000-4-2* the USB load current using both a fixed internal peak cur- 15kV Air/8kV Contact (330, 330pF)* rent threshold of the DC-DC converter and a user-config- 2 Advanced Diagnostics Through I C Bus urable external USB load current-sense amplifier thresh- Reduced Inrush Current with Soft-Start old. Over-temperature Protection -40C to +125C Operating Temperature Range Applications 32-Pin, 5mm x 5mm, TQFN Package Automotive Radio and Navigation USB Port for Host and Hub Applications *Tested in Typical Application Circuit as used on the Automotive Connectivity MAX16984A Evaluation Kit Telematics Dedicated USB Power Charger Ordering Information and Typical Application Circuit appear at end of data sheet. Apple, iPod, iPhone, iPad and CarPlay are registered trademarks of Apple, Inc. Samsung is a registered trademark of Samsung Electronics Co., Ltd. 19-100762 Rev 3 05/21MAX16984A Automotive High-Current Step-Down Converter with USB Protection/Host Charger Adapter Emulator Simplified Block Diagram RADIO MAX16984AATJAMAX16984AATJA HEAD CAPTIVE DC-DC + CABLE V USB Type-A BAT V BUS D- HVD- USB TYPE-A PORTABLE USB CONNECTOR DEVICE D+ HVD+ PHY CONFIG RADIO MAX16984AATJCMAX16984AATJC HEAD CAPTIVE DC-DC + CABLE V USB Type-A BAT VBUS D- HVD- USB TYPE-A PORTABLE USB DEVICE CONNECTOR D+ HVD+ PHY MCU IC/Diagnostic www.maximintegrated.com Maxim Integrated 2