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
I
2
C 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
ActivePath
TM
Charger Electrical Characteristics.......................................................................................... p. 17
Typical Performance Characteristics ........................................................................................................... p. 19
System control information .......................................................................................................................... p. 26
Control Signals ................................................................................................................................. p. 26
Functional Description ................................................................................................................................. p. 27
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2
C Interface ..................................................................................................................................... p. 27
Housekeeping Functions.................................................................................................................. p. 27
Step-Down DC/DC Regulators .................................................................................................................... p. 28
General Description.......................................................................................................................... p. 28
100% Duty Cycle Operation ............................................................................................................. p. 28
Synchronous Rectification ................................................................................................................ p. 28
Soft-Start .......................................................................................................................................... p. 28
Compensation .................................................................................................................................. p. 28
Configuration Options....................................................................................................................... p. 28
Output OK[ ] ..................................................................................................................................... p. 29
PCB Layout Considerations ............................................................................................................. p. 29
Low-Noise, Low-Dropout Linear Regulators................................................................................................ p. 30
General Description.......................................................................................................................... p. 30
Output Current Limit ......................................................................................................................... p. 30
Compensation .................................................................................................................................. p. 30
Configuration Options....................................................................................................................... p. 30
OUTPUT OK[ ] ................................................................................................................................. p. 30
PCB Layout Considerations ............................................................................................................. p. 30
ActivePath
TM
Charger .................................................................................................................................. p. 31
General Description.......................................................................................................................... p. 31
ActivePath
Architecture .................................................................................................................... p. 31
System Configuration Optimization .................................................................................................. p. 31
Input Protection ................................................................................................................................ p. 31
Battery Management ........................................................................................................................ p. 31
Charge Current Programming .......................................................................................................... p. 32
Charge-Control State Machine ......................................................................................................... p. 32
Thermal Regulation .......................................................................................................................... p. 34
Charge Safety Timers ...................................................................................................................... p. 34
Charge Status Indicator.................................................................................................................... p. 35
Reverse-Current Protection ............................................................................................................. p. 35
Battery Temperature Monitoring ...................................................................................................... p. 35
TQFN55-40 Package Outline and Dimensions ........................................................................................... p. 36
Innovative Power
TM
Active-Semi Proprietary―For Authorized Recipients and Customers
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