LTC3589-1 datasheet(2/36 Pages) LINER

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LTC3375

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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 I2C .. 19

I2C Interface ...........................................................20

I2C Bus Speed.........................................................20

I2C Start and Stop Conditions.................................20

I2C Byte Format ......................................................20

I2C Acknowledge ....................................................20

I2C Slave Address ...................................................21

I2C Sub-Addressed Writing.....................................22

I2C Bus Write Operation .........................................22

I2C 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

VCC 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

VCC Shunt Regulator...............................................28

Input and Output Decoupling Capacitor Selection ..29

Choosing the CT 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

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