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Automotive Hi-Speed USB 2.0 Protector

Tiny Solution for Module-to-Module Connections with Best-in-Class Eye Diagram and Integrated Protection

Product Details

The MAX20046 device provides high-ESD and short-circuit protection for the low-voltage internal USB data and USB power line in automotive radio, navigation, connectivity, and USB hub applications. The device supports USB Hi-Speed (480Mbps), USB full-speed (12Mbps), and USB low-speed (1.5Mbps) operation.

The short-circuit protection features include short-to-battery on the protected HVBUS, as well as short-to-HVBUS and short-to-battery on the protected HVD+ and HVD-. Short-to-GND and overcurrent protection are also provided on the protected HVBUS output to protect the internal BUS power rail from overcurrent faults.

The device features high-ESD protection to ±15kV Air Gap and ±8kV Contact on the protected HVBUS, HVD+, and HVD- outputs.

The device features a 500mΩ (max) USB power switch, and two low on-resistance (RON), USB 2.0 data switches. This device also features an enable input, fault output, 10ms fault-recovery time, 1ms overcurrent-blanking time, and integrated overcurrent autoretry.

The MAX20046 is available in a 12-pin lead-free, TQFN-EP package and operate over the -40°C to +105°C temperature range.

Key Features

  • Low 23mA/45mA (MAX20046GTCA/V+) or 60/120mA (MAX20046GTCC/V+) Current Threshold for Module-to-Module Applications
  • Targeted Features for Optimized USB Performance
    • Two RON 3.3Ω (typ) USB 2.0 Data Switches
    • 480Mbps, 12Mbps or 1.5Mbps USB 2.0 Operation
    • 9ms Fault-Recovery Time
    • 1ms Overcurrent Blanking Time
    • 5.7V (typ) Fixed HVBUS Protection Trip Threshold
  • Robust for the Automotive Environment
    • Short-to-Battery and Short-to-GND Protection on Protected HVBUS Output
    • Short-to-Battery and Short-to-HVBUS Protection on HVD+ and HVD- Outputs
    • Tested to ISO 10605 and IEC 61000-4-2 ESD Standards
    • 12-Pin (3mm × 3mm) TQFN-EP Package
    • -40°C to +105°C Operating Temperature Range
    • AEC-Q100 Qualified

Applications/Uses

  • Automotive USB Protection
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Simplified Block Diagram

MAX20046: Typical Operating Circuit MAX20046: Typical Operating Circuit Zoom icon

Technical Docs

Data Sheet Automotive Hi-Speed USB 2.0 Protector Mar 23, 2020

Design & Development

Click any title below to view the detail page where available.

Description

The MAX20046 evaluation kit (EV kit) demonstrates the MAX20046 automotive Hi-Speed USB 2.0 protector switch IC, featuring overvoltage protection (OVP), electrostatic discharge (ESD) protection, and undervoltage lockout (UVLO)/overcurrent protection (OCP) for automotive USB applications.

The device protects the USB BUS, D+, and D- data lines from overvoltage conditions, such as a short-to-battery and ESD events. UVLO protects the BUS against lowvoltage conditions such as a short-to-ground. The BUS OCP uses a blanking period allowing momentary BUS shorts to be ignored. All faults can be monitored using the active-low FAULT output signal.

The device can pass high-speed USB differential (D+ and D-) signals up to 480Mbps and has a low 500mΩ RON (max) for the BUS and a 3.3Ω RON (typ) for the D+ and D- lines. The EV kit is powered by the USB BUS. An on-board MAX15007A automotive regulator provides the IN reference voltage. If a 60mA/120mA current threshold is desired, the MAX20046GTC/V+ can be ordered and interchanged with U1.

View Details

Features

  • Protects USB BUS, D+, and D- Signals from Overvoltages Up to 18V and ESD Events
  • USB BUS Undervoltage Lockout
  • 23mA/45mA (typ) USB BUS Overcurrent-Protection Threshold
  • 1ms Overcurrent Blanking Time
  • Passes 480Mbps USB Data Signals
  • Low On-Resistance
    • BUS: 500mΩ (max)
    • D+ and D-: 3.3Ω (typ)
  • Active-Low FAULT Output Signal
  • USB Powered
  • Fully Assembled and Tested
  • Evaluates the MAX20046 IC in a 12-Pin TQFN Package

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Parameters

Key Features

  • Low 23mA/45mA (MAX20046GTCA/V+) or 60/120mA (MAX20046GTCC/V+) Current Threshold for Module-to-Module Applications
  • Targeted Features for Optimized USB Performance
    • Two RON 3.3Ω (typ) USB 2.0 Data Switches
    • 480Mbps, 12Mbps or 1.5Mbps USB 2.0 Operation
    • 9ms Fault-Recovery Time
    • 1ms Overcurrent Blanking Time
    • 5.7V (typ) Fixed HVBUS Protection Trip Threshold
  • Robust for the Automotive Environment
    • Short-to-Battery and Short-to-GND Protection on Protected HVBUS Output
    • Short-to-Battery and Short-to-HVBUS Protection on HVD+ and HVD- Outputs
    • Tested to ISO 10605 and IEC 61000-4-2 ESD Standards
    • 12-Pin (3mm × 3mm) TQFN-EP Package
    • -40°C to +105°C Operating Temperature Range
    • AEC-Q100 Qualified

Applications/Uses

  • Automotive USB Protection

Description

The MAX20046 device provides high-ESD and short-circuit protection for the low-voltage internal USB data and USB power line in automotive radio, navigation, connectivity, and USB hub applications. The device supports USB Hi-Speed (480Mbps), USB full-speed (12Mbps), and USB low-speed (1.5Mbps) operation.

The short-circuit protection features include short-to-battery on the protected HVBUS, as well as short-to-HVBUS and short-to-battery on the protected HVD+ and HVD-. Short-to-GND and overcurrent protection are also provided on the protected HVBUS output to protect the internal BUS power rail from overcurrent faults.

The device features high-ESD protection to ±15kV Air Gap and ±8kV Contact on the protected HVBUS, HVD+, and HVD- outputs.

The device features a 500mΩ (max) USB power switch, and two low on-resistance (RON), USB 2.0 data switches. This device also features an enable input, fault output, 10ms fault-recovery time, 1ms overcurrent-blanking time, and integrated overcurrent autoretry.

The MAX20046 is available in a 12-pin lead-free, TQFN-EP package and operate over the -40°C to +105°C temperature range.

Simplified Block Diagram

MAX20046: Typical Operating Circuit MAX20046: Typical Operating Circuit Zoom icon

Technical Docs

Data Sheet Automotive Hi-Speed USB 2.0 Protector Mar 23, 2020

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal