LT3645

2

3645f

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

BOOST Voltage……………………………………….55V

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

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

(Note 1)

16 15 14 13

5

6

7

8

TOP VIEW

UD PACKAGE

16-LEAD (3mm

× 3mm) PLASTIC QFN

9

10

11

12

4

3

2

1

NC

NC

NPG

EN2

NC

BOOST

SW

17

GND

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

1

2

3

4

5

6

EN/UVLO

FB

GND

DA

BOOST

SW

12

11

10

9

8

7

NPG

EN2

FB2

OUT2

TOP VIEW

MSE PACKAGE

12-LEAD PLASTIC MSOP

13

GND

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.

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