ACT8933

Rev 3, 15-Nov-12

- 2 -

www.active-semi.com

ActivePMU

Copyright © 2012 Active-Semi, Inc.

Active-Semi Proprietary―For Authorized Recipients and Customers

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

Global Register Map ....................................................................................................................................p. 09

Register and Bit Descriptions ......................................................................................................................p. 10

System Control Electrical Characteristics....................................................................................................p. 15

Step-Down DC/DC Electrical Characteristics ..............................................................................................p. 16

Low-Noise LDO Electrical Characteristics...................................................................................................p. 17

ActivePath

Typical Performance Characteristics...........................................................................................................p. 20

System control information ..........................................................................................................................p. 27

Interfacing with the CoreLogic LUCY...............................................................................................p. 27

Control Signals.................................................................................................................................p. 28

Push-Button Control.........................................................................................................................p. 29

Control Sequences...........................................................................................................................p. 29

Functional Description .................................................................................................................................p. 31

Voltage Monitor and Interrupt...........................................................................................................p. 31

Thermal Shutdown ...........................................................................................................................p. 32

Step-Down DC/DC Regulators ....................................................................................................................p. 33

General Description..........................................................................................................................p. 33

100% Duty Cycle Operation.............................................................................................................p. 33

Synchronous Rectification................................................................................................................p. 33

Soft-Start ..........................................................................................................................................p. 33

Compensation ..................................................................................................................................p. 33

Configuration Options.......................................................................................................................p. 33

OK[ ] and Output Fault Interrupt.......................................................................................................p. 34

PCB Layout Considerations .............................................................................................................p. 34

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

ActivePath

General Description..........................................................................................................................p. 37

ActivePath

Architecture....................................................................................................................p. 37

System Configuration Optimization..................................................................................................p. 37

Input Protection ................................................................................................................................p. 37

Battery Management ........................................................................................................................p. 37

Charge Current Programming..........................................................................................................p. 38

Charger Input Interrupts ...................................................................................................................p. 38

Charge-Control State Machine.........................................................................................................p. 40

State Machine Interrupts ..................................................................................................................p. 40

Thermal Regulation ..........................................................................................................................p. 41

Charge Safety Timers ......................................................................................................................p. 41

Charger Timer Interrupts..................................................................................................................p. 41

Charge Status Indicator....................................................................................................................p. 41

Reverse-Current Protection .............................................................................................................p. 41

Battery Temperature Monitoring ......................................................................................................p. 41

Battery Temperature Interrupts ........................................................................................................p. 42

TQFN55-40 Package Outline and Dimensions ...........................................................................................p. 43