EVALUATION KIT AVAILABLE Click here to ask about the production status of specific part numbers. MAX20461 Automotive High-Current Step-Down Converter with USB-C Protection/Host Charger General Description Benefits and Features The MAX20461 combines a 3A high-efficiency, automo- One-Chip Type-C Solution Directly from Car Battery to tive-grade, step-down converter, a USB Type-C/BC1.2 Portable Device host charger emulator, and high bandwidth USB protec- MAX20461: USB Type-C Compliant DFP Controller tion switches for automotive USB 2.0 host applications. with V Protection CONN The device also includes a USB load current-sense am- MAX20461A: USB Type-C Compliant DFP plifier and a configurable feedback-adjustment circuit that Controller provides automatic USB voltage compensation for voltage 1GHz Bandwidth USB 2.0 Data Switches drops in captive cables often found in automotive applica- 4.5V to 28V Input (40V Load Dump), Synchronous tions. The device limits the USB load current using both Buck Converter a fixed internal peak-current threshold and a user-config- 5V to 7V, 3A Output Capability urable external current-sense USB load threshold. Optimal USB Charging and Communication for The MAX20461 is optimized for high-frequency operation Portable Devices and includes programmable frequency selection from User-Programmable Voltage Gain Adjusts Output 310kHz to 2.2MHz, allowing optimization of efficiency, for Up to 474m Cable Resistance noise, and board space based on the application require- User-Programmable USB Current Limit ments. The fully synchronous DC-DC converter integrates Type-C Cable Orientation Indicator for USB3 high-side and low-side MOSFETs with an external SYNC Applications input/output, and can be configured for spread-spectrum Supports USB BC1.2 CDP and SDP Modes operation. Compatible with USB On-the-Go Specification and Apple CarPlay The MAX20461 allows flexible configuration and ad- vanced diagnostic options for both standalone and super- Low-Noise Features Prevent Interference with AM vised applications. The device can be programmed using Band and Portable Devices 2 either external programming resistors and/or internal I C Fixed-Frequency 310kHz to 2.2MHz Operation 2 registers via the I C bus. Fixed-PWM Option at No Load Spread Spectrum for EMI Reduction The MAX20461 is available in a small 5mm x 5mm 32-pin SYNC Input/Output for Frequency Parking TQFN package and is designed to minimize required ex- ternal components and layout area. Robust Design Keeps Vehicle System and Portable Device Safe in an Automotive Environment Short-to-Battery Protection on VBUS, HVD Pins Applications CC1 and CC2 Tolerant to 20V Transients Automotive Radio and Navigation 2 Advanced Diagnostics Through I C Bus USB Port for Host and Hub Applications 25kV Air/8kV Contact ISO 10605 (330pF, 2k)* Automotive Connectivity/Telematics 15kV Air/8kV Contact ISO 10605 (330pF, 2k)** 15kV Air/8kV Contact ISO 10605 (330pF, 330)* 15kV Air/8kV Contact IEC 61000-4-2 (150pF, 330)* Overtemperature Protection, Warning, and Intelligent Current Foldback -40C to +125C Operating Temperature Range *Tested in Typical Application Circuit as used on the MAX20461 Evaluation Kit with 1m captive cable. **Tested in Typical Application Circuit as used on the MAX20461 Evaluation Kit without 1m captive cable. Ordering Information appears at end of datasheet. Apple and CarPlay are registered trademarks of Apple Inc. 19-100338 Rev 5 5/21MAX20461 Automotive High-Current Step-Down Converter with USB-C Protection/Host Charger Simplified Block Diagram CAPTIVE RADIO MAX20461MAX20461 CABLE HEAD DC-DC + VBAT USB TYPE-C VBUS D- HVD- USB TYPE-C PORTABLE USB CONNECTOR DEVICE D+ HVD+ PHY VCONN CC RADIO CAPTIVE MAX20461AMAX20461A CABLE HEAD DC-DC + VBAT USB TYPE-C VBUS D- HVD- USB TYPE-C PORTABLE USB CONNECTOR DEVICE D+ HVD+ PHY CC www.maximintegrated.com Maxim Integrated 2