LTC3375
2
3375fc
For more information www.linear.com/3375
Table oF conTenTs
Features ..................................................... 1
Applications ................................................ 1
Typical Application ........................................ 1
Description.................................................. 1
Absolute Maximum Ratings .............................. 3
Order Information .......................................... 3
Pin Configuration .......................................... 3
Electrical Characteristics ................................. 4
Typical Performance Characteristics ................... 7
Pin Functions .............................................. 12
Block Diagram ............................................. 15
Operation................................................... 16
Buck Switching Regulators ..................................... 16
Buck Regulators with Combined Power Stages ...... 16
Pushbutton Interface .............................................. 17
Power-Up and Power-Down Via Pushbutton ........... 17
Power-Up and Power-Down Via Enable Pin or I
2
C .. 19
I
2
C Interface ...........................................................20
I
2
C Bus Speed .........................................................20
I
2
C Start and Stop Conditions .................................20
I
2
C Byte Format ......................................................20
I
2
C Acknowledge ....................................................20
I
2
C Slave Address ................................................... 21
I
2
C Sub-Addressed Writing .....................................22
I
2
C Bus Write Operation .........................................22
I
2
C Bus Read Operation ..........................................22
Error Condition Reporting Via RST and IRQ Pins ....22
Temperature Monitoring and
Overtemperature Protection ...................................23
RESET_ALL Functionality ....................................... 24
Programming the Operating Frequency .................. 24
V
CC
Shunt Regulator ............................................... 25
Watchdog Timer .....................................................25
Applications Information ................................ 26
Buck Switching Regulator Output Voltage and
Feedback Network ..................................................26
Buck Regulators .....................................................26
Combined Buck Regulators.....................................26
V
CC
Shunt Regulator ............................................... 28
Input and Output Decoupling Capacitor Selection ..29
Choosing the C
T
Capacitor ...................................... 29
Programming the Global Register ...........................29
Programming the RST and IRQ Mask Registers .....29
Status Byte Read Back ...........................................29
PCB Considerations ................................................ 31
Typical Applications ...................................... 32
Package Description ..................................... 35
Typical Application ....................................... 36
Related Parts .............................................. 36
(15 pages)
(36 pages)
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