LTC3855 LINER [Linear Technology], LTC3855 Datasheet - Page 51

• Manufacturer Part Number: LTC3855
• Description: Dual, Fast, Accurate Step-Down DC/DC Controller
• Manufacturer: LINER [Linear Technology]

PACKAGE DESCRIPTION
Please refer to
7.00 0.10
http://www.linear.com/designtools/packaging/
NOTE:
1. DRAWING CONFORMS TO JEDEC PACKAGE
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
5.50 0.05
OUTLINE M0-220 VARIATION WHKD
4.10 0.05
PIN 1
TOP MARK
(SEE NOTE 6)
3.00 REF
5.00 0.10
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
3.15 ± 0.05
RECOMMENDED SOLDER PAD LAYOUT
(Reference LTC DWG # 05-08-1701 Rev C)
38-Lead Plastic QFN (5mm × 7mm)
5.15 ± 0.05
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.20mm ON ANY SIDE
ON THE TOP AND BOTTOM OF PACKAGE
0.50 BSC
0.25 0.05
6.10 0.05
7.50 0.05
0.75 0.05
5.5 REF
UHF Package
for the most recent package drawings.
5.50 REF
0.00 – 0.05
0.200 REF
0.50 BSC
0.25 0.05
BOTTOM VIEW—EXPOSED PAD
0.70 0.05
5.15 ± 0.10
PACKAGE
OUTLINE
3.15 ± 0.10
3.00 REF
R = 0.125
TYP
37
38
PIN 1 NOTCH
R = 0.30 TYP OR
0.35 45 CHAMFER
R = 0.10
TYP
LTC3838
0.40 0.10
1
2
(UH) QFN REF C 1107
51
3838fa