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LTC3675 Datasheet(PDF) 2 Page - Linear Technology |
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LTC3675 Datasheet(HTML) 2 Page - Linear Technology |
2 / 38 page LTC3675/LTC3675-1 2 36751fc For more information www.linear.com/LTC3675 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 .......................................................................................... 8 Pin Functions .....................................................................................................................14 Block Diagram....................................................................................................................16 Operation..........................................................................................................................17 Buck Switching Regulator .................................................................................................................................... 17 Buck Regulators with Combined Power Stages .................................................................................................... 17 Boost Switching Regulator ................................................................................................................................... 18 Buck-Boost Switching Regulator .......................................................................................................................... 18 LED Driver ............................................................................................................................................................ 18 Pushbutton Interface and Power-Up Power-Down Sequencing ............................................................................ 19 Power-Up and Power-Down via Pushbutton ......................................................................................................... 19 Power-Up and Power-Down via Enable Pin or I2C................................................................................................. 21 LED Current Programming ................................................................................................................................... 21 I2C Interface.......................................................................................................................................................... 21 Error Condition Reporting via RSTB and IRQB Pins............................................................................................................................................. 24 Undervoltage and Overtemperature Functionality ................................................................................................. 25 Applications Information .......................................................................................................26 Switching Regulator Output Voltage and Feedback Network................................................................................. 26 Buck Regulators ................................................................................................................................................... 26 Combined Buck Regulators .................................................................................................................................. 26 Boost Regulator.................................................................................................................................................... 27 Buck-Boost Regulator........................................................................................................................................... 28 LED Driver ............................................................................................................................................................ 28 Operating the LED Driver As a High Voltage Boost Regulator............................................................................... 29 Input and Output Decoupling Capacitor Selection................................................................................................. 29 Choosing the CT Capacitor ................................................................................................................................... 30 Programming the UVOT Register ......................................................................................................................... 30 Programming the RSTB and IRQB Mask Registers .............................................................................................. 30 Status Byte Read Back ......................................................................................................................................... 31 PCB Considerations .............................................................................................................................................. 31 Typical Applications .............................................................................................................33 Package Description ............................................................................................................36 Revision History .................................................................................................................37 Typical Application ..............................................................................................................38 Related Parts .....................................................................................................................38 |
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Similar Description - LTC3675_15 |
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