Evaluation Kit for the MAX20459

Please check latest availability status for a specific part variant.


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.

Key Features

  • 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

Tools & Models

  • MAX20459EVKIT ODB Files
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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    Related Resources

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

    • One-Chip Type-C Solution Directly from Car Battery to Portable Device
    • Optimal USB Charging and Communication for Portable Devices
    • Low-Noise Features Prevent Interference with AM Band and Portable Devices

    Standalone USB Type-C and USB Power Delivery Controller

    • Customizable Firmware
    • USB Type-C Support and USB-PD Support
    • Supports BC1.2 Legacy/Proprietary Charger Detection

    Automotive USB Power Delivery Port Protector

    • USB Type-C CC1/CC2 Protection Switches
    • Integrated 550mΩ VCONN FETs with 250mAOvercurrent Protection
    • USB 2.0 D+/D- Protection Switches with 1GHz Bandwidth