ACT4751 USB Fast Charger Power IC with 40V Input Voltage, 4A, Programmable Output Voltage and Current FEATURES GENERIC DESCRIPTION Certified USB Fast Charger, Reference Designs The ACT4751 is a programmable DC-to-DC buck converter with bias supply rails. This synchronous step-down voltage Qualcomm Certified, Quick Charger Designs regulator supports a wide input voltage of 4.5 V to 40 V and integrates both the high side and low side MOSFETS. These 4.5 V to 40 V Operational Input Voltage 2 50m R transistors enable high efficiency by reducing DSON Programmable Output Voltage by I C power losses. 3 V to 24 V in 12.5 mV Step The ACT4751 main buck converter can be dynamically Programmable Output Current Limit programmed to an output voltage between 3 V and 24 V 4 A in 256 Step Resolution 2 in 12.5 mV steps via the I C or analog feedback. Also, it 450 kHz to 2.25 MHz Fixed-Frequency Current-Mode can dynamically program output current between 0 A to Control with External Clock Sync, 100% Duty Operation, 2 4 A in 256 steps via the I C in a constant-current (CC) Stable with MLCC operation mode. The main-buck operates in a proprietary Out of AM Radio / Spread-Spectrum Operation current mode control that supports external clock syncing for 50 m Integrated High-Side / Low-Side FETs switching frequencies between 450 kHz and 2.25 MHz. 5 V / 350 mA Bias Buck Converter The ACT4751 is a perfect solution for USB Power Delivery 20 mA AUX LDO, Programmable Output Voltage 2 3.0 Programmable Power Supply (PD 3.0 PPS) charging I C Interface, Fast-mode Plus (Fm+, 1 MHz) with applications. The ACT4751 integrates a 5 V / 350 mA Configurable Address mini-buck converter and a 20 mA AUX LDO to simplify Protections: application system designs. These rails can power up USB UVLO, OVP, UVP (Hiccup/Latch-off), OCP, TSD PD controllers and the 1.5W VCONN line in active USB-C Thermally Enhanced 5 mm 5 mm QFN Package cables. The ACT4751 is available in a 32-pin 5mm x 5mm QFN APPLICATIONS package with a power optimized footprint and exposed pad USB Fast Charger (PD 3.0 PPS) for improved thermal performance. Quick Charge 4, Quick Charge 4+, Quick Charge 3.0 Industrial Power Supply Infrastructure Power Supply High Power LED Lighting ACT4751-101-REF03 (Test ID: 1100) ACT4751M-101-REF05 (QC20191223118) USB Certified Fast Charger (USB PD 3.0 PPS) 4-Port Total 280W: Quick Charge 4 (USB-C 80W 2) Reference Design: USB-C 80W 1 + Quick Charge 3.0 (Type-A 60W 2) (based on AEC-Q100 version device) ACT4751 Data Sheet, Rev. E, 16-Jul-2020 1 www.qorvo.com Subject to change without noticeACT4751 USB Fast Charger Power IC with 40V Input Voltage, 4A, Programmable Output Voltage and Current Ordering Information Figure 1. Part Numbering Structure 1. Standard product options are identified in this table. Contact factory for custom options, minimum order quantity required. 2. This device is RoHS Compliant and with Pb-free plating unless specified differently. The term Pb-free means semiconductor products that are in compliance with current RoHS (Restriction of Hazardous Substances) standards. 3. Package Code designator Q represents QFN 4. Pin Count designator I represents 32 pins 5. See the Factory Programming Options section for more information about CMI. ACT4751 Data Sheet, Rev. E, 16-Jul-2020 2 www.qorvo.com Subject to change without notice