LTC3589/LTC3589-1
2
3589fc
TABLE OF CONTENTS
Features ............................................................................................................................ 1
Applications ....................................................................................................................... 1
Typical Application ............................................................................................................... 1
Description......................................................................................................................... 1
Absolute Maximum Ratings..................................................................................................... 3
Pin Configuration ................................................................................................................. 3
Order Information................................................................................................................. 3
Electrical Characteristics ........................................................................................................ 4
Typical Performance Characteristics .......................................................................................... 9
Pin Functions .....................................................................................................................13
Block Diagram....................................................................................................................15
Operation..........................................................................................................................16
Introduction .......................................................................................................................................................... 16
Always-On LDO..................................................................................................................................................... 17
LTC3589 to LTC3589-1 Functional Comparison .................................................................................................... 17
Step-Down Switching Regulators ......................................................................................................................... 19
Buck-Boost Switching Regulator .......................................................................................................................... 23
Slewing DAC Reference Operation........................................................................................................................ 27
Pushbutton Operation........................................................................................................................................... 28
Enable and Power-On Sequencing ........................................................................................................................ 30
Fault Detection, Shutdown, and Reporting............................................................................................................ 31
I2C Operation ........................................................................................................................................................ 33
Thermal Considerations and Board Layout ........................................................................................................... 40
Applications Information .......................................................................................................41
Typical Application ..............................................................................................................43
Package Description ............................................................................................................44
Revision History .................................................................................................................45
Typical Application ..............................................................................................................46
Related Parts .....................................................................................................................46