LT3645_15 datasheet(2/24 Pages) LINER

2 / 24 page

LT3645

3645f

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

VIN, EN/UVLO (Note 5).......................…….–0.3V to 55V

BOOST Voltage……………………………………….55V

BOOST Above SW Voltage ............................... …….25V

VCC2 Voltage .............................................. –0.3V to 16V

VOUT2 Voltage .............................................. –0.3V to 8V

FB, FB2 Voltages .......................................... –0.3V to 6V

(Note 1)

16 15 14 13

TOP VIEW

UD PACKAGE

16-LEAD (3mm

× 3mm) PLASTIC QFN

NPG

EN2

VIN

BOOST

GND

θJA = 58.7°C/W, θJC = 7.1°C/W

EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB

EN/UVLO

GND

BOOST

NPG

EN2

FB2

OUT2

VCC2

VIN

TOP VIEW

MSE PACKAGE

12-LEAD PLASTIC MSOP

GND

θJA = 40°C/W, θJC = 5°C/W TO 10°C/W

EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING*

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LT3645EUD#PBF

LT3645EUD#TRPBF

LFVS

16-Lead Plastic QFN

–40°C to 125°C

LT3645IUD#PBF

LT3645IUD#TRPBF

LFVS

16-Lead Plastic QFN

–40°C to 125°C

LT3645EMSE#PBF

LT3645EMSE#TRPBF

3645

12-Lead Plastic MSOP

–40°C to 125°C

LT3645IMSE#PBF

LT3645IMSE#TRPBF

3645

12-Lead Plastic MSOP

–40°C to 125°C

LT3645HMSE#PBF

LT3645HMSE#TRPBF

3645

12-Lead Plastic MSOP

–40°C to 150°C

Consult LTC Marketing for parts speciﬁed with wider operating temperature ranges. *The temperature grade is identiﬁed by a label on the shipping container.

Consult LTC Marketing for information on non-standard lead based ﬁnish parts.

For more information on lead free part marking, go to: http://www.linear.com/leadfree/

For more information on tape and reel speciﬁcations, go to: http://www.linear.com/tapeandreel/

EN2, NPG Voltages .................................... –0.3V to 16V

Operating Junction Temperature Range (Note 2)

LT3645E ............................................ –40°C to 125°C

LT3645I ............................................. –40°C to 125°C

LT3645H............................................ –40°C to 150°C

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

Lead Temperature (Soldering, 10 sec)…… ........... 300°C

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