LTC3577-3/LTC3577-4

2

357734fa

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 ..........................................................................................................10

PIN FUNCTIONS.........................................................................................................................................................16

BLOCK DIAGRAM ......................................................................................................................................................19

OPERATION ...............................................................................................................................................................20

PowerPath OPERATION .........................................................................................................................................20

LOW DROPOUT LINEAR REGULATOR OPERATION...............................................................................................29

STEP-DOWN SWITCHING REGULATOR OPERATION ............................................................................................30

LED BACKLIGHT/BOOST OPERATION ...................................................................................................................34

PUSHBUTTON INTERFACE OPERATION ................................................................................................................43

LAYOUT AND THERMAL CONSIDERATIONS .........................................................................................................47

TYPICAL APPLICATION..............................................................................................................................................49

PACKAGE DESCRIPTION............................................................................................................................................51

RELATED PARTS........................................................................................................................................................52