LT8685S

2

Rev. 0

For more information www.analog.com

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

EN/UVLO, EN2, EN3, EN4..........................................42V

PG1, PG2, PG3, PG4, SYNC/MODE.............................6V

BIAS........................................................... –0.3V to 14V

FB1, FB2, FB3, FB4......................................................4V

TRK/SS1, TRK/SS2, TRK/SS3, TRK/SS4....................4V

Operating Junction Temperature (Notes 2, 3)

LT8685SR.......................................... –40°C to 150°C

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

Maximum Reflow (Package Body)

Temperature..........................................................260°C

(Note 1)

TRK/SS2

SYNC/MODE

RT

TRK/SS4

SW2

BST2

PG2

BIAS

TRK/SS3

PG3

BST3

SW3

SW3

TOP VIEW

LQFN PACKAGE

36-LEAD (5mm × 6mm × 0.95mm)

EXPOSED PAD (PINS 37 TO 40) MUST BE SOLDERED TO PCB GND

NOTE:

1) θ VALUES ARE DETERMINED BY SIMULATION PER JESD51 CONDITIONS;

1

2

3

4

5

6

7

8

9

10

28

27

26

25

24

23

22

21

20

19

13

12

11

14

15

16

17

18

34

35

36

33

32

31

30

29

37

GND

38

GND

39

GND

40

GND

ORDER INFORMATION

PART NUMBER

TAPE AND REEL

PAD OR

BALL FINISH

PART MARKING

PACKAGE

TYPE*

MSL

RATING

TEMPERATURE RANGE

(SEE NOTE 2)

DEVICE

FINISH CODE

LT8685SRV#PBF

LT8685SRV#TRPBF

Au (RoHS)

8685S

e4

LQFN (Laminate Package

with QFN Footprint)

3

–40°C to 150°C

AUTOMOTIVE PRODUCTS**

LT8685SRV#WPBF LT8685SRV#WTRPBF

Au (RoHS)

8685S

e4

LQFN (Laminate Package

with QFN Footprint)

3

–40°C to 150°C

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

• Tape and reel specifications.

• Parts ending with PBF and RoHS are WEEE compliant.

• Recommended LGA and BGA PCB Assembly and Manufacturing

Procedures

• LGA and BGA Package and Tray Drawings

*The LT8685S package has the same dimensions as a standard 5mm × 6mm 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.