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ACT8849 Datasheet(PDF) 2 Page - Active-Semi, Inc |
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ACT8849 Datasheet(HTML) 2 Page - Active-Semi, Inc |
2 / 35 page ACT8849 Rev PrB, 12-Jun-14 Innovative PowerTM - 2 - www.active-semi.com Copyright © 2014 Active-Semi, Inc. Active-Semi Confidential―Do Not Copy or Distribute ActivePMU TM is a trademark of Active-Semi. I2CTM is a trademark of NXP. TABLE OF CONTENTS General Information .....................................................................................................................................p. 01 Functional Block Diagram............................................................................................................................p. 03 Ordering Information....................................................................................................................................p. 04 Pin Configuration .........................................................................................................................................p. 04 Pin Descriptions...........................................................................................................................................p. 05 Absolute Maximum Ratings .........................................................................................................................p. 07 I2C Interface Electrical Characteristics ........................................................................................................p. 08 Global Register Map ....................................................................................................................................p. 09 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 Low-Input Voltage LDO Electrical Characteristics.......................................................................................p. 19 Low-Power (Always-On) LDO Electrical Characteristics.............................................................................p. 20 Typical Performance Characteristics……………………………………………………………………………..p. 21 System Control Information .........................................................................................................................p. 25 Interfacing with the Samsung Exynos4412 Processors...................................................................p. 25 Control Signals.................................................................................................................................p. 27 Push-Button Control.........................................................................................................................p. 28 Control Sequences...........................................................................................................................p. 28 Watch-Dog Supervision ...................................................................................................................p. 29 Software-Initiated Power Cycle ........................................................................................................p. 29 Functional Description .................................................................................................................................p. 30 I2C Interface .....................................................................................................................................p. 30 Housekeeping Functions..................................................................................................................p. 30 Thermal Protection...........................................................................................................................p. 30 Step-Down DC/DC Regulators ....................................................................................................................p. 31 General Description..........................................................................................................................p. 31 100% Duty Cycle Operation.............................................................................................................p. 31 Operating Mode................................................................................................................................p. 31 Synchronous Rectification................................................................................................................p. 31 Soft-Start ..........................................................................................................................................p. 31 Compensation ..................................................................................................................................p. 31 Configuration Options.......................................................................................................................p. 31 OK[ ] and Output Fault Interrupt.......................................................................................................p. 32 PCB Layout Considerations .............................................................................................................p. 32 Low-Noise, Low-Dropout Linear Regulators................................................................................................p. 33 General Description..........................................................................................................................p. 33 Output Current Limit .........................................................................................................................p. 33 Compensation ..................................................................................................................................p. 33 Configuration Options.......................................................................................................................p. 33 OK[ ] and Output Fault Interrupt.......................................................................................................p. 33 PCB Layout Considerations .............................................................................................................p. 33 Always-On LDO (REG13)............................................................................................................................p. 34 General Description..........................................................................................................................p. 34 Reverse-Current Protection .............................................................................................................p. 34 Typical Application ...........................................................................................................................p. 34 TQFN66-48 Package Outline and Dimensions ...........................................................................................p. 35 |
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