參數(shù)資料
型號(hào)： LTC3675EUFF#TRPBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 電源管理
英文描述： POWER SUPPLY SUPPORT CKT, PQCC44
封裝： 4 X 7 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, QFN-44
文件頁數(shù)： 12/36頁
文件大?。?/td> 413K
代理商： LTC3675EUFF#TRPBF
LTC3675
2
3675f
TABLE OF CONTENTS
Features ............................................................................................................................ 1
Applications ....................................................................................................................... 1
Typical Application ............................................................................................................... 1
Description......................................................................................................................... 1
Absolute Maximum Ratings..................................................................................................... 3
Order Information................................................................................................................. 3
Pin Conguration ................................................................................................................. 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 .............................................................................................................32
Package Description ............................................................................................................35
Typical Application ..............................................................................................................36
Related Parts .....................................................................................................................36
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