MAX20459

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


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Description

The MAX20459 combines a 3A high-efficiency, automo- tive-grade, step-down converter, a USB Type-C DFP con- troller, and automatic BC1.2 DCP, Apple®, and Samsung® dedicated charger-detection circuitry. The device also includes a USB load current-sense amplifier and configurable feedback-adjustment circuit designed to provide automatic USB voltage compensation. The device limits the USB load current using both a fixed internal peak-cur- rent threshold and a user-configurable external current- sense USB load threshold.

The MAX20459 is optimized for high-frequency operation and includes programmable frequency selection from 310kHz to 2.2MHz, allowing optimization of efficiency, noise, and board space based on application require- ments. The fully synchronous DC-DC converter integrates high-side and low-side MOSFETs along with an external SYNC input/output, and can be configured for spread- spectrum operation. Additionally, thermal foldback is im- plemented to avoid excessive heating of the module while charging at high ambient temperature.

TThe MAX20459 allows flexible configuration and ad- vanced diagnostic options for both standalone and super- vised applications. The device can operate as a true one- chip solution that offers advanced fault autorecovery and can be programmed using external programming resistors and/or internal I2C registers.

The MAX20459 is available in a small 5mm x 5mm 32-pin TQFN package and is designed to minimize required ex- ternal components and layout area..

MAX20459: Typical Application Circuits MAX20459: Typical Application Circuits Enlarge+

Key Features

  • 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

Applications/Uses

  • Dedicated Charging Modules
  • Dedicated USB Charging Port (DCP)
  • Host and Hub Module Dedicated Charging Ports

MAX20459EVKIT: Evaluation Kit for the MAX20459
Request Reliability Report for: MAX20459 
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


MAX20459
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

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