LT8705 datasheet(22/24 Pages) LINER

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LT3840

3840fa

For more information www.linear.com/LT3840

package DescripTion

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

4.00

±0.10

2.40 REF

6.00

±0.10

NOTE:

1. DRAWING IS NOT A JEDEC PACKAGE OUTLINE

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 0.15mm ON ANY SIDE

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

(NOTE 6)

0.40

±0.10

BOTTOM VIEW—EXPOSED PAD

4.40 REF

0.75

±0.05

R = 0.115

TYP

R = 0.10

TYP

PIN 1 NOTCH

R = 0.30 OR

0.35

× 45°

CHAMFER

0.20

±0.05

0.40 BSC

0.200 REF

0.00 – 0.05

(UFE38) QFN 0708 REV B

RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS

APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED

0.70

±0.05

0.20

±0.05

0.40 BSC

2.40 REF

4.40 REF

5.10

±0.05

6.50

±0.05

2.65

±0.05

3.10

±0.05

4.50

±0.05

PACKAGE OUTLINE

2.65

±0.10

4.65

±0.10

4.65

±0.05

UFE Package

38-Lead Plastic QFN (4mm

× 6mm)

(Reference LTC DWG # 05-08-1750 Rev B)

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