LT8638S

2

Rev. 0

For more information www.analog.com

ORDER INFORMATION

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

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

FB, SS, PHMODE . ......................................................4V

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

Operating Junction Temperature Range (Note 2)

LT8638SE .......................................... –40°C to 125°C

LT8638SJ .......................................... –40°C to 150°C

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

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

(Note 1)

24

25

26

27

28

23

9

10 11 12 13 14

TOP VIEW

LQFN PACKAGE

28-LEAD (5mm × 4mm × 0.94mm)

EXPOSED PAD (PINS 29-32) ARE GND, SHOULD BE SOLDERED TO PCB

PHMODE

BIAS

BST

SW

SW

SW

SW

RT

EN/UV

GND

NC

22

21

20

19

18

17

16

15

1

2

3

4

5

6

7

8

31

GND

29

GND

32

GND

30

GND

PART NUMBER

PAD OR BALL

FINISH

PART MARKING*

PACKAGE

TYPE**

MSL

RATING

TEMPERATURE RANGE

(SEE NOTE 2)

DEVICE

FINISH CODE

LT8638SEV#PBF

Au (RoHS)

8638S

e4

LQFN (Laminate Package

with QFN Footprint)

3

–40°C to 125°C

LT8638SJV#PBF

–40°C to 150°C

AUTOMOTIVE PRODUCTS***

LT8638SEV#WPBF

Au (RoHS)

8638S

e4

LQFN (Laminate Package

with QFN Footprint)

3

–40°C to 125°C

LT8638SJV#WPBF

–40°C to 150°C

• 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 identified 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 LT8638S package has the same dimensions as a standard 5mm × 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.