LT3955

2

3955fb

For more information www.linear.com/LT3955

orDer inFormaTion

LEAD FREE FINISH

TAPE AND REEL

PART MARKING*

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LT3955EUHE#PBF

LT3955EUHE#TRPBF

3955

36-Lead (5mm × 6mm) Plastic QFN

–40°C to 125°C

LT3955IUHE#PBF

LT3955IUHE#TRPBF

3955

36-Lead (5mm × 6mm) Plastic QFN

–40°C to 125°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/

pin conFiguraTion

absoluTe maximum raTings

ISP, ISN, SW .............................................................80V

PWMOUT........................................................... (Note 2)

CTRL, VMODE...........................................................15V

FB, PWM, SYNC.......................................................9.6V

RT, DIM/SS ..............................................................1.5V

PGND, GNDK to GND .............................................±0.5V

Operating Ambient Temperature Range

(Notes 3, 4)............................................ –40°C to 125°C

Maximum Junction Temperature .......................... 125°C

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

(Note 1)

12 13 14

TOP VIEW

37

GND

38

SW

UHE PACKAGE

36-LEAD (5mm

× 6mm) PLASTIC QFN

15 16 17

36 35 34 33 32 31 30

21

23

24

25

27

28

8

6

4

3

2

1

SYNC

EN/UVLO

GND

SW

SW

NC

ISP

ISN

FB

GND

PWMOUT

SW

SW

20

9

10

EXPOSED PAD (PIN 37) IS GND, MUST BE SOLDERED TO GND PLANE

EXPOSED PAD (PIN 38) IS SW, MUST BE SOLDERED TO SW PLANE