MAX20459

PRODUCTION

Automotive High-Current Step-Down Converter with USB-C Dedicated Charging Port

Industry's Highest Integrated Automotive USB Type-C Charge Enumerator with Buck Converter

Part Models
6
1ku List Price
Starting From $1.66
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Part Details

  • One-Chip Type-C Solution Directly from Car Battery to Portable Device
    • USB Type-C-Compliant DFP Controller
    • Integrated iPhone®/iPad®, Samsung® and BC1.2 DCP Charger Detection
    • 4.5V to 28V Input (40V Load Dump), Synchronous Buck Converter
    • 5V to 7V, 3A Output Capability
    • Standalone Device or I2C Configuration Options and Fault Autorecovery
  • Optimal USB Charging and Communication for Portable Devices
    • User-Programmable Voltage Gain Adjusts Output for up to 474mΩ Cable Resistance
    • User-Programmable USB Current Limit
  • Low-Noise Features Prevent Interference with AM Band and Portable Devices
    • Fixed-Frequency 310kHz to 2.2MHz Operation
    • Fixed-PWM Option at No Load
    • Spread Spectrum for EMI Reduction
    • SYNC Input/Output for Frequency Parking
  • Robust Design Keeps Vehicle System and Portable Device Safe in an Automotive Environment
    • Short-to-Battery Protection on VBUS, HVD± Pins
    • ±15kV Air/±8kV Contact ISO 10605 (330pF, 330Ω)*
    • ±15kV Air/±8kV Contact ISO 10605 (330pF, 2kΩ)*
    • ±15kV Air/±8kV Contact IEC 61000-4-2 (150pF, 330Ω)*
    • Overtemperature Protection, Warning, and Intelligent Current Foldback
    • AEC-Q100 Qualified
    • -40°C to +125°C Operating Temperature Range
MAX20459
Automotive High-Current Step-Down Converter with USB-C Dedicated Charging Port
MAX20459: Typical Application Circuits
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Evaluation Kits

MAX20459EVKIT

Evaluation Kit for the MAX20459

Features and Benefits

  • Configurable Charge-Detection Modes
    • USB-C 3.0A, 1.5A, 0.5A
    • USB-IF BC1.2 DCP
    • Apple 2.4A, 1.0A
    • Samsung 2.0A
    • China YD/T 1591-2009 Charging Specification
  • Automatic USB Voltage Adjustment by Integrated DC-DC Converter (275kHz - 2.2MHz)
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX20459 evaluation kit (EV kit) demonstrates the MAX20459 automotive high-current, high-efficiency, stepdown DC-DC converter with integrated USB Type-C DFP controller and host-charger-adapter emulation, which provides ESD and short-to-battery protection.

The MAX20459 features integrated host-charger portdetection circuitry adhering to the USB Type-C specification, the USB-IF BC1.2 battery charging specification, Apple iPod/iPhone/iPad® and Samsung® charge-detection termination resistors, and Chinese Telecommunication Industry Standard YD/T 1591-2009.

The MAX20459 step-down, synchronous, DC-DC converter operates from a voltage of up to 28V continuous and protects against load-dump transients up to 40V. The converter is programmable for frequencies from 275kHz to 2.2MHz and can deliver 3A continuously.

The MAX20459 integrates thermal management in a twostage approach to limit maximum die temperature. In the first stage, the standalone variant reduces the Type-C handshake and DC current limit by one step when die temperature exceeds 130°C (typ). The second stage triggers DC-DC shutdown if the die temperature continues rising and exceeds 165°C (typ).

The EV kit is populated with a standalone enabled MAX20459ATJC/V+ that is configured by pull-down resistors. The I2C variant (MAX20459ATJA/V+) allows for flexible configuration, detailed fault diagnostics, and access to the on-chip ADC that reports die temperature, output voltage, and output current. The I2C features are easily accessed by using the Maxim MINIQUSB module along with the provided example GUI.

MAX20459EVKIT
Evaluation Kit for the MAX20459

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