ACT8865
Rev 2, 11-Feb-14
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. 14
Step-Down DC/DC Electrical Characteristics..............................................................................................p. 15
Low-Noise LDO Electrical Characteristics...................................................................................................p. 16
Typical Performance Characteristics...........................................................................................................p. 17
System control information ..........................................................................................................................p. 21
Control Signals.................................................................................................................................p. 21
Push-Button Control.........................................................................................................................p. 22
Control Sequences(1) ......................................................................................................................p. 23
Functional Description .................................................................................................................................p. 24
I2C Interface .....................................................................................................................................p. 24
Voltage Monitor and Interrupt...........................................................................................................p. 24
Thermal Shutdown ...........................................................................................................................p. 24
Step-Down DC/DC Regulators ....................................................................................................................p. 25
General Description..........................................................................................................................p. 25
100% Duty Cycle Operation.............................................................................................................p. 25
Synchronous Rectification................................................................................................................p. 25
Soft-Start ..........................................................................................................................................p. 25
Compensation ..................................................................................................................................p. 25
Configuration Options.......................................................................................................................p. 25
OK[ ] and Output Fault Interrupt.......................................................................................................p. 25
PCB Layout Considerations .............................................................................................................p. 26
Low-Noise, Low-Dropout Linear Regulators................................................................................................p. 27
General Description..........................................................................................................................p. 27
Output Current Limit.........................................................................................................................p. 27
Compensation ..................................................................................................................................p. 27
Configuration Options.......................................................................................................................p. 27
OK[ ] and Output Fault Interrupt.......................................................................................................p. 27
PCB Layout Considerations .............................................................................................................p. 28
TQFN44-32 Package Outline and Dimensions ...........................................................................................p. 29
Revision History...........................................................................................................................................p. 30
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