EVALUATION KIT AVAILABLE Click here to ask about the production status of specific part numbers. MAX20459 Automotive High-Current Step-Down Converter with USB-C Dedicated Charging Port General Description Benefits and Features The MAX20459 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 DFP con- Portable Device troller, and automatic BC1.2 DCP, Apple , and Sam- USB Type-C-Compliant DFP Controller sung dedicated charger-detection circuitry. The device Integrated iPhone/iPad, Samsung and BC1.2 also includes a USB load current-sense amplifier and con- DCP Charger Detection figurable feedback-adjustment circuit designed to provide 4.5V to 28V Input (40V Load Dump), Synchronous automatic USB voltage compensation. The device limits Buck Converter the USB load current using both a fixed internal peak-cur- 5V to 7V, 3A Output Capability 2 rent threshold and a user-configurable external current- Standalone Device or I C Configuration Options sense USB load threshold. and Fault Autorecovery The MAX20459 is optimized for high-frequency operation Optimal USB Charging and Communication for and includes programmable frequency selection from Portable Devices 310kHz to 2.2MHz, allowing optimization of efficiency, User-Programmable Voltage Gain Adjusts Output noise, and board space based on application require- for up to 474m Cable Resistance ments. The fully synchronous DC-DC converter integrates User-Programmable USB Current Limit high-side and low-side MOSFETs along with an external Low-Noise Features Prevent Interference with AM SYNC input/output, and can be configured for spread- Band and Portable Devices spectrum operation. Additionally, thermal foldback is im- Fixed-Frequency 310kHz to 2.2MHz Operation plemented to avoid excessive heating of the module while Fixed-PWM Option at No Load charging at high ambient temperature. Spread Spectrum for EMI Reduction The MAX20459 allows flexible configuration and ad- SYNC Input/Output for Frequency Parking vanced diagnostic options for both standalone and super- Robust Design Keeps Vehicle System and Portable vised applications. The device can operate as a true one- Device Safe in an Automotive Environment chip solution that offers advanced fault autorecovery and Short-to-Battery Protection on V , HVD Pins BUS can be programmed using external programming resistors 15kV Air/8kV Contact ISO 10605 (330pF, 330)* 2 and/or internal I C registers. 15kV Air/8kV Contact ISO 10605 (330pF, 2k)* The MAX20459 is available in a small 5mm x 5mm 32-pin 15kV Air/8kV Contact IEC 61000-4-2 (150pF, TQFN package and is designed to minimize required ex- 330)* ternal components and layout area. Overtemperature Protection, Warning, and Intelligent Current Foldback AEC-Q100 Qualified Applications -40C to +125C Operating Temperature Range Dedicated USB Charging Port (DCP) Host and Hub Module Dedicated Charging Ports *Tested in Typical Application Circuit as used on the Dedicated Charging Modules MAX20459 Evaluation Kit Ordering Information appears at end of datasheet. Apple is a registered trademark of Apple Inc. Samsung is a registered trademark of Samsung Electronics Co., Ltd. 19-100676 Rev 3 5/21MAX20459 Automotive High-Current Step-Down Converter with USB-C Dedicated Charging Port Simplified Block Diagram Charging MAX20459ATJAMAX20459ATJA Module DC-DC + V USB Type-C BAT V BUS USB Type-C Portable HVD- Connector Device HVD+ IC/ MCU Diag. CC1/CC2 Charging MAX20459ATJCMAX20459ATJC Module DC-DC + V USB Type-C BAT V BUS USB Type-C Portable HVD- Connector Device HVD+ CONFIG CC1/CC2 www.maximintegrated.com Maxim Integrated 2