Analog Devices Inc. MAX16984A Automotive Step-Down Converters
Analog Devices Inc. MAX16984A Automotive High-Current Step-Down Converters consolidate a 5V automotive-grade step-down converter capable of driving up to 3.0A, 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.
Analog Devices MAX16984A Step-Down Converters operate from a voltage up to 28V and are protected from load dump transients up to 40V. The MAX16984A is optimized for high-frequency operation and includes resistor-programmable frequency selection from 310kHz to 2.2MHz. These features allow the optimization of efficiency, noise, and board space based on application requirements.
Additionally, the MAX16984A Automotive Converters include 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.
Features
- Integrated DC-DC and USB host charge emulator enables 1-chip solution directly from car battery to portable device
- 4.5V to 28V operating voltage (40V load dump)
- 5V, 3.0A output current capability
- Low-Q current skip and shutdown modes
- Soft-start reduces inrush current
- Optimal USB power and communication for portable devices
- User-adjustable voltage gain adjusts output between 5V and 7V for cable compensation
- ±5% accuracy user-adjustable USB current limit
- 4Ω USB 2.0 1GHz data switches
- Integrated Samsung/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 (SDP)
- Low-noise features prevent interference with AM band and portable devices
- 310kHz to 2.2MHz fixed-frequency operation
- Forced-PWM option at no load
- Spread spectrum for EMI reduction
- SYNC input/output for frequency parking
- Robust design keeps vehicle systems and portable devices safe in an automotive environment
- Short-to-battery protection on DC-DC converter
- Short-to-battery protection on USB pins
- ±15kV 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
- 32-pin, 5mm x 5mm, TQFN package
Applications
- Automotive radio and navigation
- USB port for host and hub applications
- Automotive connectivity
- Telematics
- Dedicated USB power charger
Simplified Block Diagram
Associated Eval Kit
Analog Devices / Maxim Integrated MAX16984LEVKIT Evaluation Kit
Demonstration platform for the MAX16984L (MAX16984R/MAX16984S) Automotive Step-Down DC-DC Converter.
Analog Devices Inc. MAX16984AEVKIT Evaluation Kit
Configured to evaluate the MAX16984A automotive DC-DC converter with USB Type-A controller.