MPQ4485 36V, 6A, Step-Down Converter with Dual USB Charging Ports Supporting Type-C 5V 3A DFP Mode and BC1.2 CDP Mode for Automotive, AEC-Q100 Qualified DESCRIPTION FEATURES Wide 6V to 36V Operating Input Voltage The MPQ4485 integrates a monolithic, step- Range down, switch-mode converter with two USB Fixed 5.17V Output Voltage current-limit switches and charging port identification circuitry. The MPQ4485 achieves 90mV Line Drop Compensation 6A of output current with excellent load and line Accurate USB1/USB2 Output Current Limit regulation over a wide input supply range. 18m/15m Low R Internal Buck DS(ON) Power MOSFETs The output of the USB switch is current-limited. 18m/18m Low R Internal DS(ON) USB1 supports DCP schemes for battery USB1/USB2 Power MOSFETs charging specification (BC1.2), divider mode, 450kHz Switching Frequency 1.2V/1.2V mode, and USB Type-C 5V 3A Forced CCM Operation DFP mode, eliminating the need for outside Load Shedding versus Temperature for user interaction. USB2 supports DCP and CDP MPQ4485GU-LS-AEC1 schemes. USB Output Over-Voltage Protection (OVP) Full protection features include hiccup current Fast Over-Current Response for USB limiting, output over-voltage protection (OVP), Switch and thermal shutdown. Hiccup Current Limit The MPQ4485 requires a minimal number of Supports DCP Schemes for BC1.2, Divider readily available, standard, external Mode, and 1.2V/1.2V Mode components and is available in a QFN-26 USB1 Supports USB Type-C 5V 3A (5mmx5mm) package. Mode, USB2 Supports CDP Mode 8kV HBM ESD Rating for USB, DP, DM, DP OUT, and DM OUT Available in a QFN-26 (5mmx5mm) Package Available in AEC-Q100 Grade 1 APPLICATIONS USB Charging Downstream Port (CDP) USB Dedicated Charging Ports (DCP) USB Type-C Charging Port All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For MPS green status, please visit the MPS website under Quality Assurance. MPS and The Future of Analog IC Technology are registered trademarks of Monolithic Power Systems, Inc. MPQ4485 Rev.1.0 www.MonolithicPower.com 1 9/18/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2017 MPS. All Rights Reserved. MPQ4485 STEP-DOWN CONVERTER WITH DUAL USB CHARGING PORTS TYPICAL APPLICATION C4 220nF Efficiency vs. Load Current L1 Vout=5.17V VIN BST 100 SW 12V 4.7H C2 + IN C2A C1 C1A OUT 270F + 20F 96 100F 50F USB1 C5 92 4.7F EN MPQ4485 88 DM1 R4 U POL R1 150 USB1, 3A DP1 84 S 0 CC2 B Vin=12V MODE CC1 80 C7 Vin=6V USB2 1nF C6 VCC R3 76 Vin=36V C3 4.7F 1k 1F DM2 U DP2 72 S USB2, 2.5A L3, Bead, DP2 OUT B 0 1 2 3 4 5 1k 100MHz DM2 OUT Load Current (A) AGND PGND To Host Controller MPQ4485 Rev.1.0 www.MonolithicPower.com 2 9/18/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2017 MPS. All Rights Reserved. Efficiency(%)