LT3669_15 datasheet(2/40 Pages) LINER

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LT3669/LT3669-2

3669fa

For more information www.linear.com/LT3669

ABSOLUTE MAXIMUM RATINGS

L+, EN/UVLO Voltage (Note 3) .................... –60V to 60V

CQ1, Q2 Voltage.......................................... –60V to 60V

(L+ to CQ1), (L+ to Q2) Voltage................... –60V to 60V

DIO, LDOIN Voltage (Note 3) ...................... –0.3V to 60V

DIO Above L+ Voltage ...............................................90V

BST Voltage ..............................................................50V

BST Above SW Voltage.............................................30V

BD Voltage ................................................................30V

LDO Voltage................................................................8V

LDO Above LDOIN Voltage .......................................0.3V

(Notes 1 and 2)

PIN CONFIGURATION

FBOUT, FBLDO, SYNC Voltage.......................................6V

CPOR, RT, ILIM Voltage ..............................................3V

SR, TXEN1, TXD1, TXEN2, TXD2 Voltage .................30V

SC1, SC2, WAKE, RST, RXD1 Voltage .......................30V

Operating Junction Temperature

Range (Notes 4 and 5)

LT3669E ............................................ –40°C to 125°C

LT3669I ............................................. –40°C to 125°C

LT3669H............................................ –40°C to 150°C

Storage Temperature Range .................. –65°C to 150°C

LT3669

LT3669-2

9 10

TOP VIEW

UFD PACKAGE

28-LEAD (4mm

× 5mm) PLASTIC QFN

GND

11 12 13

28 27 26 25 24

SC1

SC2

WAKE

RXD1

TXEN1

TXD1

TXEN2

TXD2

FBOUT

FBLDO

LDO

LDOIN

BST

θJA = 44°C/W, θJC = 8°C/W

EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB