ACT8945A Advanced PMU for Atmel SAMA5Dx Series & SAM9 Series Processors infrastructures, network gateways, M2M systems, 2D FEATURES barcode scanners, barcode printers, machine vision Three Step-Down DC/DC Converters equipment, as well as home and commercial building automations, POS terminals, medical devices and white Four Low-Dropout Linear Regulators TM goods. This device integrates the ActivePath complete TM Integrated ActivePath Charger battery charging and management system with seven 2 TM I C Serial Interface power supply channels. Advanced Enable/Disable Sequencing Controller This device features three step-down DC/DC converters and four low-noise, low-dropout linear Minimal External Components regulators, along with a complete battery charging Tiny 55mm TQFN55-40 Package TM solution featuring the advanced ActivePath 0.75mm Package Height system-power selection function. Pb-Free and RoHS Compliant The three DC/DC converters utilize a high- efficiency, fixed-frequency (2MHz), current-mode PWM control architecture that requires a minimum GENERAL DESCRIPTION number of external components. Two DC/DCs are The ACT8945A is a complete, cost effective, highly- capable of supplying up to 1100mA of output TM efficient ActivePM power management solution, current, while the third supports up to 1200mA. All optimized for the unique power, voltage- sequencing, four low-dropout linear regulators are high- and control requirements of the Atmel SAMA5D3 series: performance, low-noise regulators that supply up to SAMA5D 31/33/34/35/36 , and Atmel SAM9 series: 320mA of output current. SAM9G 15/25/35/45/46 , SAM9X 25/35 , SAM9M 10/11 , The ACT8945A is available in a compact, Pb-Free SAM9N 11/12 processors. It is ideal for a wide range of and RoHS-compliant TQFN55-40 package high performance portable handheld applications such as human-machine interfaces, control panels, smart grid TYPICAL APPLICATION DIAGRAM Data Sheet Rev. G, January 2020 Subject to change without notice 1 of 46 www.qorvo.com 2020 Qorvo US, Inc. All rights reserved. ACT8945A Advanced PMU for Atmel SAMA5Dx Series & SAM9 Series Processors TABLE OF CONTENTS General Information ..................................................................................................................................................... p. 01 Functional Block Diagram ............................................................................................................. p. 04 Ordering Information ................................................................................................................................................... p. 05 Pin Configuration ......................................................................................................................................................... p. 05 Pin Descriptions .......................................................................................................................................................... p. 06 Absolute Maximum Ratings ......................................................................................................................................... p. 08 2 I C Interface Electrical Characteristics ........................................................................................................................ p. 09 Global Register Map .................................................................................................................................................... p. 10 Register and Bit Descriptions ...................................................................................................................................... p. 11 System Control Electrical Characteristics.................................................................................................................... p. 16 Step-Down DC/DC Electrical Characteristics .............................................................................................................. p. 17 Low-Noise LDO Electrical Characteristics................................................................................................................... p. 18 TM ActivePath Charger Electrical Characteristics ......................................................................................................... p. 19 Typical Performance Characteristics ........................................................................................................................... p. 21 System Control Information ......................................................................................................................................... p. 27 Interfacing with the Atmel SAMA5D3 Series & SAM9 Series Processors ................................................................... p. 27 Control Signals .............................................................................................................................................. p. 28 Push-Button Control ...................................................................................................................................... p. 29 Control Sequences ........................................................................................................................................ p. 29 Functional Description ................................................................................................................................................. p. 30 2 I C Interface ................................................................................................................................................... p. 30 Voltage Monitor and Interrupt ........................................................................................................................ p. 30 Thermal Shutdown ........................................................................................................................................ p. 31 Step-Down DC/DC Regulators .................................................................................................................................... p. 32 General Description ....................................................................................................................................... p. 32 100% Duty Cycle Operation .......................................................................................................................... p. 32 Synchronous Rectification ............................................................................................................................. p. 32 Soft-Start........................................................................................................................................................ p. 32 Compensation ............................................................................................................................................... p. 32 Configuration Options .................................................................................................................................... p. 32 OK and Output Fault Interrupt .................................................................................................................... p. 33 PCB Layout Considerations........................................................................................................................... p. 33 Low-Noise, Low-Dropout Linear Regulators ................................................................................................................ p. 35 General Description ....................................................................................................................................... p. 35 Output Current Limit ...................................................................................................................................... p. 35 Compensation ............................................................................................................................................... p. 35 Configuration Options .................................................................................................................................... p. 35 OK and Output Fault Interrupt .................................................................................................................... p. 35 PCB Layout Considerations........................................................................................................................... p. 35 TM ActivePath Charger .................................................................................................................................................. p. 37 General Description ....................................................................................................................................... p. 37 ActivePath Architecture ................................................................................................................................. p. 37 System Configuration Optimization ............................................................................................................... p. 37 Input Protection .............................................................................................................................................. p. 37 Battery Management ..................................................................................................................................... p. 37 Data Sheet Rev. G, January 2020 Subject to change without notice 2 of 46 www.qorvo.com 2020 Qorvo US, Inc. All rights reserved.