ACT8897 查看數據表（PDF） - Active-Semi, Inc
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ACT8897 Datasheet PDF : 32 Pages
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ACT8897
Rev 2, 05-Sep-13
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. 10
System Control Electrical Characteristics....................................................................................................p. 13
Step-Down DC/DC Electrical Characteristics ..............................................................................................p. 14
Low-Noise LDO Electrical Characteristics...................................................................................................p. 15
Typical Performance Characteristics...........................................................................................................p. 16
System control information ..........................................................................................................................p. 21
Interfacing with the Samsung S5PV210 ..........................................................................................p. 21
Control Signals .................................................................................................................................p. 22
Push-Button Control.........................................................................................................................p. 23
Control Sequences...........................................................................................................................p. 23
Functional Description .................................................................................................................................p. 26
I2C Interface .....................................................................................................................................p. 26
Voltage Monitor and Interrupt...........................................................................................................p. 26
Thermal Shutdown ...........................................................................................................................p. 26
Step-Down DC/DC Regulators ....................................................................................................................p. 27
General Description..........................................................................................................................p. 27
100% Duty Cycle Operation.............................................................................................................p. 27
Synchronous Rectification................................................................................................................p. 27
Soft-Start ..........................................................................................................................................p. 27
Compensation ..................................................................................................................................p. 27
Configuration Options.......................................................................................................................p. 27
OK[ ] and Output Fault Interrupt.......................................................................................................p. 28
PCB Layout Considerations .............................................................................................................p. 28
Low-Noise, Low-Dropout Linear Regulators................................................................................................p. 29
General Description..........................................................................................................................p. 29
Output Current Limit .........................................................................................................................p. 29
Compensation ..................................................................................................................................p. 29
Configuration Options.......................................................................................................................p. 29
OK[ ] and Output Fault Interrupt.......................................................................................................p. 29
PCB Layout Considerations .............................................................................................................p. 29
TQFN44-32 Package Outline and Dimensions ...........................................................................................p. 31
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