ACT8945A Rev 5, 03-Mar-15 Advanced PMU for Atmel SAMA5Dx Series & SAM9 Series Processors panels, smart grid infrastructures, network gateways, FEATURES M2M systems, 2D barcode scanners, barcode printers, machine vision equipment, as well as home and Three Step-Down DC/DC Converters commercial building automations, POS terminals, Four Low-Dropout Linear Regulators medical devices and white goods. This device TM TM Integrated ActivePath Charger integrates the ActivePath complete battery charging 2 TM and management system with seven power supply I C Serial Interface channels. Advanced Enable/Disable Sequencing Controller This device features three step-down DC/DC Minimal External Components converters and four low-noise, low-dropout linear Tiny 55mm TQFN55-40 Package regulators, along with a complete battery charging 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 GENERAL DESCRIPTION PWM control architecture that requires a minimum The ACT8945A is a complete, cost effective, highly- number of external components. Two DC/DCs are TM efficient ActivePMU power management solution, capable of supplying up to 1100mA of output optimized for the unique power, voltage- current, while the third supports up to 1200mA. All sequencing, and control requirements of the Atmel four low-dropout linear regulators are high- SAMA5D3 series: SAMA5D 31/33/34/35/36 , and Atmel performance, low-noise regulators that supply up to SAM9 series: SAM9G 15/25/35/45/46 , SAM9X 25/35 , 320mA of output current. SAM9M 10/11 , SAM9N 11/12 processors. It is ideal The ACT8945A is available in a compact, Pb-Free for a wide range of high performance portable handheld and RoHS-compliant TQFN55-40 package. applications such as human-machine interfaces, control TYPICAL APPLICATION DIAGRAM Atmel SAMA5Dx ACT8945A Li+ Battery + CHGIN TH TM ActivePath Charger Control REG1 1.8V 1150mA VDDIODDR etc. ISET REG2 1.2V 1150mA VDDCORE GBIT ENET etc. REG3 3.3V 1300mA VDDIOP etc. REG4 320mA VDDFUSE REG5 320mA VDDANA nSTAT CHARGE REG6 320mA Auxiliary 1 STATUS REG7 320mA Auxiliary 1 TWD SDA SCL TWCK PUSH BUTTON nPBIN NRST nRSTO nIRQ FIQ/IRQ nPBSTAT GPIO TM Innovative Power - 1 - www.active-semi.com Active-Semi ProprietaryFor Authorized Recipients and Customers TM TM ActivePMU and ActivePath are trademarks of Active-Semi. Copyright 2015 Active-Semi, Inc. 2 TM I C is a trademark of NXP. ACT8945A Rev 5, 03-Mar-15 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. 28 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. 34 General Description .......................................................................................................................... p. 34 Output Current Limit ......................................................................................................................... p. 34 Compensation .................................................................................................................................. p. 34 Configuration Options ....................................................................................................................... p. 34 OK and Output Fault Interrupt ....................................................................................................... p. 34 PCB Layout Considerations ............................................................................................................. p. 34 TM ActivePath Charger .................................................................................................................................. p. 36 General Description .......................................................................................................................... p. 36 ActivePath Architecture .................................................................................................................... p. 36 System Configuration Optimization .................................................................................................. p. 36 Input Protection ................................................................................................................................ p. 36 Battery Management ........................................................................................................................ p. 36 Charge Current Programming .......................................................................................................... p. 37 Charger Input Interrupts ................................................................................................................... p. 37 Charge-Control State Machine ......................................................................................................... p. 39 State Machine Interrupts .................................................................................................................. p. 39 Thermal Regulation .......................................................................................................................... p. 40 Charge Safety Timers ...................................................................................................................... p. 40 Charger Timer Interrupts .................................................................................................................. p. 40 Charge Status Indicator.................................................................................................................... p. 40 Reverse-Current Protection ............................................................................................................. p. 40 Battery Temperature Monitoring ...................................................................................................... p. 40 Battery Temperature Interrupts ........................................................................................................ p. 41 TM www.active-semi.com Innovative Power - 2 - Active-Semi ProprietaryFor Authorized Recipients and Customers TM TM ActivePMU and ActivePath are trademarks of Active-Semi. Copyright 2015 Active-Semi, Inc. 2 TM I C is a trademark of NXP.