MAX16984
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MAX16984

Automotive High-Current Step-Down Converter with USB Protection/Host Charger Adapter Emulator

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Industry's First USB Data Protection Switch that Integrates a High-Voltage, Feedback-Adjustable DC-DC Converter

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Part Models 16
1ku List Price Starting From $1.68
Features
  • Integrated DC-DC and USB Host Charge Emulator Enables 1-Chip Solution Directly from Car Battery to Portable Device
    • 4.5V to 28V (42V Load Dump) Operating Voltage
    • 5V, 2.5A Output Current Capability
    • Low-Q Current Skip and Shutdown Modes
    • Soft-Start Reduces Inrush Current
  • Low-Noise Features Prevent Interference with AM Band and Portable Devices
    • Fixed-Frequency 220kHz to 2.2MHz Operation
    • Forced-PWM Option at No Load
    • Spread Spectrum for EMI Reduction
    • SYNC Input for Frequency Parking
  • Optimal USB Power and Communication for Portable Devices
    • User-Adjustable Voltage Gain Adjusts Output Between 5V and 6.15V for Cable Compensation
    • ±3% Accuracy User-Adjustable USB Current Limit
    • 4Ω USB 2.0 480Mbps/12Mbps Data Switches
    • Integrated iPod/iPhone/iPad Charge-Detection Termination Resistors
    • Supports USB BC1.2 Charging Downstream Port(CDP) and Dedicated Charging Port (DCP) Modes
    • Supports Chinese Telecommunication Industry Standard YD/T 1591-2009
    • Compatible with USB On-the-Go Specification
    • High-Speed Pass-Through Mode
  • Robust Design Keeps Vehicle System and Portable Devices Safe in Automotive Environment
    • Short-to-Battery Protection on DC-DC Converter
    • Short-to-Battery Protection on USB Pins
    • ±25kV Air/±8kV Contact ISO 10605
    • ±15kV Air/±8kV Contact IEC 61000-4-2
    • ±15kV Air/±8kV Contact (330Ω, 330pF)
    • Fault-Indication Active-Low, Open-Drain Output
    • Reduced Inrush Current with Soft-Start
    • Overtemperature Protection
    • -40°C to +125°C Operating Temperature Range
    • 28-Pin, 5mm x 5mm, TQFN and Side-Wettable QFND Packages
    • 4mm x 4mm, 28-Pin CPQFN and Side-Wettable version available
Additional Details
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The MAX16984 combines a 5V automotive-grade step-down converter capable of driving up to 2.5A, a USB host charger adapter emulator, and USB protection switches for automotive USB host applications. The USB protection switches provide high-ESD, short-circuit protection and feature integrated host-charger port-detection circuitry adhering to the USB 2.0 Battery Charging Specification BC1.2 battery charging specification and Chinese Telecommunication Industry Standard YD/T 1591-2009. They also include circuitry for iPod®/iPhone® 1.0A and iPad® 2.1A dedicated charging modes. The HVD+ and HVD- ESD protection features include protection to ±15kV Air/±8kV Contact on the HVD+ and HVD- outputs to the IEC 61000-4-2 model and 330Ω, 330pF ESD model.

The high-efficiency step-down DC-DC converter operates from a voltage up to 28V and is protected from load dump transients up to 42V. The device is optimized for high-frequency operation and includes resistor-programmable frequency selection from 220kHz to 2.2MHz to allow optimization of efficiency, noise, and board space based on application requirements. The converter has an internal high-side n-channel switch and uses a low forward-drop freewheeling Schottky diode for rectification. There is a small low-side n-channel switch to maintain fixed frequency under light loads. For lower quiescent current operation requirements, the low-side n-channel switch can be disabled to allow skip mode operation under light loads. The converter can deliver up to 2.1A of continuous current at 105°C. The MAX16984S has an integrated spread-spectrum oscillator to improve EMI performance.

The MAX16984 also includes a USB load current-sense amplifier and configurable feedback adjustment circuit designed to provide automatic USB voltage adjustment to compensate for voltage drops in captive cables associated with automotive applications. The MAX16984 limits the USB load current using both a fixed internal peak current threshold of the DC-DC converter and a user-configurable external USB load current-sense amplifier threshold.

Applications

  • Automotive Connectivity
  • Automotive Radio and Navigation
  • Dedicated USB Power Charger
  • Telematics
  • USB Port for Host and Hub Applications
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Part Models 16
1ku List Price Starting From $1.68
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MAX16984

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UPDATED 07/06/2018
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MAX16984: Automotive High-Current Step-Down Converter with USB Protection/Host Charger Adapter Emulator Data Sheet (Rev.0)

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Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

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Software & Part Ecosystem

Evaluation Kits 2

MAX16984EVKIT

Evaluation Kit for the MAX16984

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MAX16984EVKIT

Evaluation Kit for the MAX16984

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MAX16984EVKIT
Evaluation Kit for the MAX16984

Features and Benefits

  • Configurable Charge-Detection Modes
    • USB-IF BC1.2 CDP, DCP
    • Apple 2.1A, 1.0A
    • China YD/T1591-2009 Charging Specification
  • Automatic USB Voltage Adjustment by Integrated DC-DC Converter (220kHz to 2.2MHz)
  • Proven PCB Layout
  • Fully Assembled and Tested
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Product Detail

The MAX16984 evaluation kit (EV kit) demonstrates the MAX16984 automotive high-current step-down converter with USB protection/host charger adapter emulator.

The device features integrated host-charger port-detection circuitry adhering to the USB 2.0 BC1.2 battery charging specification and also features circuitry for Apple® iPod®/ iPhone® 1.0A and iPad® 2.1A dedicated charging modes.

The device integrates high-side current sensing and voltage-adjustment circuitry that provides automatic USB voltage adjustment to compensate for voltage drops in captive cables associated with automotive applications.

The device’s step-down DC-DC converter operates from a voltage of up to 28V continuous and is protected from load-dump transients up to 42V. The converter is resistorprogrammable for 220kHz to 2.2MHz frequencies and can deliver 2.1A continuously.

The EV kit is configured for 2.2MHz operation, and the included 3-meter USB cable allows for demonstration of the cable-compensation capability of the device. This EV kit has been tuned for optimal eye quality at the end of the supplied USB cable; this tuning method is referred to as far-eye tuning. The USB 2.0 Hi-Speed eye diagram for this EV kit is shown in Figure 1.

The EV kit serves as a basic reference diagram for designs using the MAX16984. Component selection and layout should be closely followed to ensure optimal application performance. For additional support or design assistance, contact factory.

Applications

  • Automotive Connectivity
  • Automotive Radio and Navigation
  • Dedicated USB Power Charger
  • Telematics
  • USB Port for Host and Hub Applications

MAX16984LEVKIT

Evaluation Kit for the MAX16984 (MAX16984R/ MAX16984S in CQFN package)

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MAX16984LEVKIT

Evaluation Kit for the MAX16984 (MAX16984R/ MAX16984S in CQFN package)

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MAX16984LEVKIT
Evaluation Kit for the MAX16984 (MAX16984R/ MAX16984S in CQFN package)

Features and Benefits

  • Configurable Charge Detection Modes
    • USB-IF BC1.2 CDP, DCP
    • Apple 2.1A, 1.0A
    • China YD/T1591-2009 Charging Specification
  • Automatic USB Voltage Adjustment by Integrated DC-DC Converter (220kHz to 2.2MHz)
  • Proven PCB Layout
  • Fully Assembled and Tested
Buy Now View Details

Product Detail

MAX16984L evaluation kit (EV kit) demonstrates the MAX16984L automotive high-efficiency step-down DC-DC converter with integrated USB protection and host charger adapter.

The MAX16984L features integrated host-charger portdetection circuitry adhering to the USB 2.0 BC1.2 battery charging specification and also features circuitry for Apple® iPod®/iPhone® 1.0A and iPad® 2.1A dedication charging modes.

The MAX16984L integrates high-side current sensing and voltage-adjustment circuitry that provides automatic USB voltage adjustment to compensate for voltage drops in captive cables associated with automotive applications.

The MAX16984L step-down DC-DC converter operates from a voltage of up to 28V continuous and is protected from load dump transients to 42V. The converter is resistor- programmable for frequencies from 220kHz to 2.2MHz and can deliver 2.1A continuously.

The EV kit is configured for 2.2MHz operation, and the included 3-meter USB cable allows for demonstration of the cable compensation capability of the MAX16984L. This EV kit has been tuned for optimal EYE quality at the end of the supplied USB cable; this tuning method is referred to as far-eye tuning. The USB 2.0 high-speed eye diagram for this EV kit is shown in Figure 1.

Applications

  • Automotive Connectivity
  • Automotive Radio and Navigation
  • Dedicated USB Power Charger
  • Telematics
  • USB Port for Host and Hub Applications

Resources

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MAX16984LEVKIT ODB Files - Design Files Download

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Evaluation Kits2

MAX16984EVKIT

Evaluation Kit for the MAX16984

MAX16984LEVKIT

Evaluation Kit for the MAX16984 (MAX16984R/ MAX16984S in CQFN package)

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