Datasheet

LTC3589/LTC3589-1/
LTC3589-2
2
3589ff
For more information www.linear.com/3589
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
LTC3589, LTC3589-1, and LTC3589-2 Functional Comparison ............................................................................. 17
Always-On LDO ..................................................................................................................................................... 17
Step-Down Switching Regulators ......................................................................................................................... 20
Buck-Boost Switching Regulator .......................................................................................................................... 24
Slewing DAC Reference Operation ........................................................................................................................ 28
Pushbutton Operation ........................................................................................................................................... 29
Enable and Power-On Sequencing ........................................................................................................................ 31
Fault Detection, Shutdown, and Reporting ............................................................................................................ 32
I
2
C Operation ........................................................................................................................................................ 36
Thermal Considerations and Board Layout ........................................................................................................... 42
Typical Application ..............................................................................................................46
Package Description ............................................................................................................48
Revision History .................................................................................................................49
Typical Application ..............................................................................................................50
Related Parts .....................................................................................................................50