LT8645S-2

2

Rev. A

For more information www.analog.com

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

VIN, EN/UV................................................................65V

PG.............................................................................42V

BIAS..........................................................................25V

FB, TR/SS . .................................................................4V

SYNC/MODE Voltage . ................................................6V

Operating Junction Temperature Range (Note 2)

LT8645S-2E....................................... –40°C to 125°C

LT8645S-2J....................................... –40°C to 150°C

LT8645S-2H ...................................... –40°C to 150°C

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

Maximum Reflow (Package Body) Temperature ...260°C

(Note 1)

ORDER INFORMATION

LQFN PACKAGE

32-LEAD (6mm × 4mm × 0.94mm)

JEDEC BOARD: θJA = 30°C/W, ΨJT = 0.6°C/W,

θJCTOP = 28.5°C/W, θJC(PAD) = 4.4°C/W (NOTE 3)

DEMO BOARD: θJA = 17°C/W

EXPOSED PADS (PINS 33-38) ARE GND, SHOULD BE SOLDERED TO PCB

TOP VIEW

11

12

13

14

15

16

32

31

30

29

28

27

21

17

18

19

20

26

22

23

24

25

6

10

9

8

7

1

5

4

3

2

VIN

GND

GND

GND

NC

BIAS

VIN

VIN

NC

INTVCC

VIN

GND

GND

GND

NC

RT

VIN

VIN

NC

EN/UV

33

GND

34

GND

35

GND

36

GND

37

GND

38

GND

PART NUMBER

PART MARKING*

FINISH CODE

PAD FINISH

PACKAGE TYPE**

MSL

RATING

TEMPERATURE RANGE

LT8645SEV-2#PBF

86452

e4

Au (RoHS)

LQFN (Laminate Package

with QFN Footprint)

3

–40°C to 125°C

LT8645SJV-2#PBF

–40°C to 150°C

LT8645SHV-2#PBF

AUTOMOTIVE PRODUCTS***

LT8645SEV-2#WPBF

86452

e4

Au (RoHS)

LQFN (Laminate Package

with QFN Footprint)

3

–40°C to 125°C

LT8645SJV-2#WPBF

–40°C to 150°C

LT8645SHV-2#WPBF

• Contact the factory for parts specified with wider operating temperature

ranges. *Pad or ball finish code is per IPC/JEDEC J-STD-609.

• Recommended LGA and BGA PCB Assembly and Manufacturing

Procedures

• LGA and BGA Package and Tray Drawings

Parts ending with PBF are RoHS and WEEE compliant. **The LT8645S-2 package has the same footprint as a standard 6mm × 4mm QFN Package.

***Versions of this part are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. These

models are designated with a #W suffix. Only the automotive grade products shown are available for use in automotive applications. Contact your

local Analog Devices account representative for specific product ordering information and to obtain the specific Automotive Reliability reports for

these models.