TAPE AND REEL (MINI) TAPE AND REEL

PAD OR

BALL FINISH

PART MARKING*

PACKAGE

TYPE**

MSL

RATING

TEMPERATURE RANGE

(SEE NOTE 2)

DEVICE FINISH CODE

LT8644SIV#TRMPBF

LT8644SIV#TRPBF

Au (RoHS)

8644S

e4

LQFN (Laminate Package

with QFN Footprint)

3

–40°C to 125°C

AUTOMOTIVE PRODUCTS***

LT8644SIV#WTRMPBF

LT8644SIV#WTRPBF Au (RoHS)

8644S

e4

LQFN (Laminate Package

with QFN Footprint)

3

–40°C to 125°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

Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.

Parts ending with PBF are RoHS and WEEE compliant. **The LT8644S 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.

LT8644S

2

Rev. 0

For more information www.analog.com

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

PG...............................................................................8V

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

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

Operating Junction Temperature Range (Note 2)

LT8644SI........................................... –40°C to 125°C

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

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

(Note 1)

l

denotes the specifications which apply over the full operating

ORDER INFORMATION

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

l

2.7

8

V

1.5

8

V

l

6

12

µA

l

125

125

195

245

µA

µA

Feedback Reference Voltage

l

0.598

0.595

0.6

0.6

0.602

0.603

V

V

20

21

22

23

24

19

7

8

9

10 11 12

TOP VIEW

LQFN PACKAGE

24-LEAD (4mm × 4mm × 0.95mm)

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

PHMODE

AGND

RT

EN/UV

PGND

18

17

16

15

14

13

1

2

3

4

5

6

27

PGND

25

PGND

28

PGND

26

PGND