LT8640S/LT8643S/

LT8640SA/LT8643SA

2

Rev. D

For more information www.analog.com

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

VIN, EN/UV, PG..........................................................42V

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

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

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

(Note 1)

ORDER INFORMATION

PART NUMBER

TAPE AND REEL

PAD

FINISH

PART MARKING*

PACKAGE

TYPE**

MSL

RATING TEMPERATURE RANGE

DEVICE

FINISH CODE

LT8640SEV#PBF

LT8640SEV#TRPBF

Au(RoHS)

8640S

e4

LQFN (Laminate Package

with QFN Footprint)

3

–40°C to 125°C

LT8640SIV#PBF

LT8640SIV#TRPBF

LT8643SEV#PBF

LT8643SEV#TRPBF

8643S

LT8643SIV#PBF

LT8643SIV#TRPBF

LT8640SAAV#PBF

LT8640SAAV#TRPBF

8640A

LT8643SAAV#PBF

LT8643SAAV#TRPBF

8643A

AUTOMOTIVE PRODUCTS***

LT8640SEV#WPBF LT8640SEV#WTRPBF

Au(RoHS)

8640S

e4

LQFN (Laminate Package

with QFN Footprint)

3

–40°C to 125°C

LT8640SIV#WPBF

LT8640SIV#WTRPBF

LT8643SEV#WPBF LT8643SEV#WTRPBF

8643S

LT8643SIV#WPBF

LT8643SIV#WTRPBF

• Contact the factory for parts specified with wider operating temperature ranges.

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

• Device temperature grade is indicated by a label on the shipping container.

• 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 LT8640S/LT8643S/LT8640SA/LT8643SA package has the same dimensions as a standard 4mm ×

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.

LT8640S/LT8640SA

LT8643S/LT8643SA

Operating Junction Temperature Range (Note 2)

LT8640SE/LT8643SE......................... –40°C to 125°C

LT8640SI/LT8643SI........................... –40°C to 125°C

LT8640SAA/LT8643SAA ................... –40°C to 125°C

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

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

20

21

22

23

24

19

7

8

9

10 11 12

TOP VIEW

LQFN PACKAGE

24-LEAD (4mm × 4mm × 0.94mm)

JEDEC BOARD: θJA = 38°C/W, θJC(PAD) = 7°C/W (Note 3)

DEMO BOARD: θJA = 24°C/W

EXPOSED PAD (PINS 25–28) ARE GND, SHOULD BE SOLDERED TO PCB

BIAS

INTVCC

GND

NC

VIN

VIN

RT

EN/UV

GND

NC

VIN

VIN

18

17

16

15

14

13

1

2

3

4

5

6

27

GND

25

GND

28

GND

26

GND

20

21

22

23

24

19

7

8

9

10 11 12

TOP VIEW

LQFN PACKAGE

24-LEAD (4mm × 4mm × 0.94mm)

JEDEC BOARD: θJA = 38°C/W, θJC(PAD) = 7°C/W (Note 3)

DEMO BOARD: θJA = 24°C/W

EXPOSED PAD (PINS 25–28) ARE GND, SHOULD BE SOLDERED TO PCB

BIAS

INTVCC

GND

NC

VIN

VIN

RT

EN/UV

GND

NC

VIN

VIN

18

17

16

15

14

13

1

2

3

4

5

6

27

GND

25

GND

28

GND

26

GND