LTC3853_15 datasheet(34/36 Pages) LINER

34 / 36 page

LTC3853

3853fc

For more information www.linear.com/LTC3853

PACKAGE DESCRIPTION

Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.

6.00 ±0.10

(4 SIDES)

NOTE:

1. DRAWING IS A JEDEC PACKAGE OUTLINE VARIATION OF (WJJD-2)

2. DRAWING NOT TO SCALE

3. ALL DIMENSIONS ARE IN MILLIMETERS

4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE

MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.20mm ON ANY SIDE, IF PRESENT

5. EXPOSED PAD SHALL BE SOLDER PLATED

6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE

PIN 1 TOP MARK

(SEE NOTE 6)

PIN 1 NOTCH

R = 0.45 OR

0.35

× 45°

CHAMFER

0.40 ±0.10

BOTTOM VIEW—EXPOSED PAD

4.50 REF

(4-SIDES)

4.42 ±0.10

4.42 ±0.05

0.75 ±0.05

R = 0.115

TYP

0.25 ±0.05

0.50 BSC

0.200 REF

0.00 – 0.05

(UJ40) QFN REV Ø 0406

RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS

APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED

0.70 ±0.05

4.50 ±0.05

(4 SIDES)

5.10 ±0.05

6.50 ±0.05

0.25 ±0.05

0.50 BSC

PACKAGE OUTLINE

R = 0.10

TYP

UJ Package

40-Lead Plastic QFN (6mm

× 6mm)

(Reference LTC DWG # 05-08-1728 Rev Ø)

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