Evaluation Kit Design Tools Support Available Resources and Models Click here to ask an associate for production status of specific part numbers. Automotive High-Current Step-Down Converter with MAX16984 USB Protection/Host Charger Adapter Emulator General Description Benefits and Features Integrated DC-DC and USB Host Charge Emulator The MAX16984 combines a 5V automotive-grade step- Enables 1-Chip Solution Directly from Car Battery to down converter capable of driving up to 2.5A, a USB host Portable Device charger adapter emulator, and USB protection switches 4.5V to 28V (42V Load Dump) Operating Voltage for automotive USB host applications. The USB protection 5V, 2.5A Output Current Capability switches provide high-ESD, short-circuit protection and Low-Q Current Skip and Shutdown Modes feature integrated host-charger port-detection circuitry Soft-Start Reduces Inrush Current adhering to the USB 2.0 Battery Charging Specifica- tion BC1.2 battery charging specification and Chinese Low-Noise Features Prevent Interference with AM Telecommunication Industry Standard YD/T 1591-2009. Band and Portable Devices They also include circuitry for iPod /iPhone 1.0A and Fixed-Frequency 220kHz to 2.2MHz Operation Forced-PWM Option at No Load iPad 2.1A dedicated charging modes. The HVD+ and Spread Spectrum for EMI Reduction HVD- ESD protection features include protection to 15kV SYNC Input for Frequency Parking Air/8kV Contact on the HVD+ and HVD- outputs to the IEC 61000-4-2 model and 330, 330pF ESD model. Optimal USB Power and Communication for Portable Devices The high-efficiency step-down DC-DC converter User-Adjustable Voltage Gain Adjusts Output operates from a voltage up to 28V and is protected Between 5V and 6.15V for Cable Compensation from load dump transients up to 42V. The device is opti- 3% Accuracy User-Adjustable USB Current Limit mized for high-frequency operation and includes resistor- 4 USB 2.0 480Mbps/12Mbps Data Switches programmable frequency selection from 220kHz to 2.2MHz Integrated iPod/iPhone/iPad Charge-Detection to allow optimization of efficiency, noise, and board space Termination Resistors based on application requirements. The converter has Supports USB BC1.2 Charging Downstream Port an internal high-side n-channel switch and uses a low (CDP) and Dedicated Charging Port (DCP) Modes forward-drop freewheeling Schottky diode for rectification. Supports Chinese Telecommunication Industry There is a small low-side n-channel switch to maintain fixed Standard YD/T 1591-2009 frequency under light loads. For lower quiescent current Compatible with USB On-the-Go Specification operation requirements, the low side n-channel switch can High-Speed Pass-Through Mode be disabled to allow skip mode operation under light loads. Robust Design Keeps Vehicle System and The converter can deliver up to 2.1A of continuous current Portable Devices Safe in Automotive Environment at 105C. The MAX16984S has an integrated spread- Short-to-Battery Protection on DC-DC Converter spectrum oscillator to improve EMI performance. Short-to-Battery Protection on USB Pins The MAX16984 also includes a USB load current-sense 25kV Air/8kV Contact ISO 10605 amplifier and configurable feedback adjustment circuit 15kV Air/8kV Contact IEC 61000-4-2 15kV Air/8kV Contact (330, 330pF) designed to provide automatic USB voltage adjustment to Fault-Indication Active-Low, Open-Drain Output compensate for voltage drops in captive cables associated Reduced Inrush Current with Soft-Start with automotive applications. The MAX16984 limits the Overtemperature Protection USB load current using both a fixed internal peak current -40C to +125C Operating Temperature Range threshold of the DC-DC converter and a user-configurable 28-Pin, 5mm x 5mm, TQFN and Side-Wettable external USB load current-sense amplifier threshold. QFND Packages 4mm x 4mm, 28-Pin CPQFN and Side-Wettable Applications version available Automotive Radio and Navigation USB Port for Host and Hub Applications Ordering Information and Typical Operating Circuit appear at end of data sheet. Automotive Connectivity Telematics iPod, iPhone, and iPad are registered trademarks of Apple, Inc. Dedicated USB Power Charger 19-6627 Rev 8 3/21 2021 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. One Analog Way, Wilmington, MA 01887 U.S.A. Tel: 781.329.4700 2021 Analog Devices, Inc. All rights reserved.MAX16984 Automotive High-Current Step-Down Converter with USB Protection/Host Charger Adapter Emulator Absolute Maximum Ratings IN, D+, D-, CD0, CD1, FBPER, BST to LX (Note 1) ..................................................-0.3V to +6V FBMAX, SENSO, FBCAP to GND ......................-0.3V to +6V PGND to GND ......................................................-0.3V to +0.3V FAULT, FOSC, BIAS, SYNC to GND ......................-0.3V to +6V Output Short-Circuit Duration ....................................Continuous D+, D-, to IN .......................................................................+0.3V Continuous Power Dissipation (T = 70C) A HVD+, HVD- to GND .............................................-0.3V to +18V Side-Wettable QFND (derate 33.3mW/C above +70C).. 2666.7mW SENSN, SENSP to GND .......................................-0.3V to +30V TQFN (derate 34.5mW/C above +70C) ................2759mW SENSP to SENSN ................................................-6.0V to +6.0V Operating Temperature Range ..........................-40C to +125C SUP, SUPSW, ENBUCK to GND ..........................-0.3V to +42V Junction Temperature ..................................................... +150C LX (Note 1) ............................................................-0.3V to +42V Storage Temperature Range .............................-65C to +150C SUP to SUPSW ....................................................-0.3V to +0.3V Lead Temperature (soldering, 10s) ................................+300C BST to GND ..........................................................-0.3V to +47V Soldering Temperature (reflow) ......................................+260C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Package Thermal Characteristics (Note 2) Side-Wettable QFND TQFN Junction-to-Ambient Thermal Resistance (q )...........30C/W Junction-to-Ambient Thermal Resistance (q )...........29C/W JA JA Junction-to-Case Thermal Resistance (q ) .................2C/W Junction-to-Case Thermal Resistance (q ) .................2C/W JC JC CPQFN Junction-to-Ambient Thermal Resistance (q ) ..........35C/W JA Junction-to-Case Thermal Resistance (q ) .................3C/W JC Note 1: Self-protected against transient voltages exceeding these limits for 50ns under normal operation and loads up to the maximum rated output current. Note 2: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. Electrical Characteristics (V = V = 14V, V = V = 3.3V, T = T = -40C to +125C, unless otherwise noted. Typical values are at T = +25C.) SUP SUPSW ENBUCK IN A J A (Note 3) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLY AND ENABLE Supply Voltage Range V Normal operation 4.5 28 V SUP Load Dump Event Supply V t < 1s (Note 4) 42 V SUP LD Voltage Range V = 0V 6 20 A IN V = 0V, no load, skip mode 620 950 A SYNC Supply Current I SUP V = 3.3V, no load, FPWM mode SYNC 9 mA (Note 4) BIAS Voltage V 5.75V < V = V < 28V 4.71 5 5.31 V BIAS SUP SUPSW BIAS Current Limit 40 120 mA BIAS Undervoltage Lockout V V rising 3.93 4.2 4.46 V UV BIAS BIAS BIAS Undervoltage Lockout 0.36 V Hysteresis IN Voltage Range V 3.0 3.6 V IN IN Enable High V 1.6 V IN IH IN Enable Low V 0.5 V IN IL www.analog.com Analog Devices 2