LTC3643
24
3643fb
For more information www.linear.com/LTC3643
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/product/LTC3643#packaging for the most recent package drawings.
3.00 ±0.10
1.50 REF
5.00 ±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
23 24
1
2
BOTTOM VIEW—EXPOSED PAD
3.50 REF
0.75 ±0.05
R = 0.115
TYP
PIN 1 NOTCH
R = 0.20 OR 0.25
× 45° CHAMFER
0.25 ±0.05
0.50 BSC
0.200 REF
0.00 – 0.05
(UDD24) QFN 0808 REV Ø
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
0.70 ±0.05
0.25 ±0.05
3.50 REF
4.10 ±0.05
5.50 ±0.05
1.50 REF
2.10 ±0.05
3.50 ±0.05
PACKAGE OUTLINE
R = 0.05 TYP
1.65 ±0.10
3.65 ±0.10
1.65 ±0.05
UDD Package
24-Lead Plastic QFN (3mm × 5mm)
(Reference LTC DWG # 05-08-1833 Rev Ø)
3.65 ±0.05
0.50 BSC
