LT3640EFE LINER [Linear Technology], LT3640EFE Datasheet - Page 22

• Manufacturer Part Number: LT3640EFE
• Description: Dual Monolithic Buck Regulator with Power-On Reset and Watchdog Timer
• Manufacturer: LINER [Linear Technology]

LT3640
PACKAGE DESCRIPTION
22
6.60 ±0.10
4.50 ±0.10
NOTE:
1. CONTROLLING DIMENSION: MILLIMETERS
2. DIMENSIONS ARE IN
3. DRAWING NOT TO SCALE
RECOMMENDED SOLDER PAD LAYOUT
(.0035 – .0079)
0.09 – 0.20
SEE NOTE 4
(.187)
MILLIMETERS
4.75
(INCHES)
(.169 – .177)
4.30 – 4.50*
(.020 – .030)
0.50 – 0.75
0.65 BSC
0.45 ±0.05
*DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH
28-Lead Plastic TSSOP (4.4mm)
(.108)
4. RECOMMENDED MINIMUM PCB METAL SIZE
(Reference LTC DWG # 05-08-1663)
2.74
SHALL NOT EXCEED 0.150mm (.006") PER SIDE
FOR EXPOSED PAD ATTACHMENT
1.05 ±0.10
Exposed Pad Variation EB
0.25
REF
0° – 8°
PAD HEAT SINK
ON BOTTOM OF
FE Package
EXPOSED
PACKAGE
(.0256)
0.65
BSC
28 2726 25 24 23
1
(.0077 – .0118)
0.195 – 0.30
2
TYP
3 4 5 6 7 8 9 10 11 12 13 14
(.378 – .386)
9.60 – 9.80*
22 21
(.187)
4.75
20
19
18 17
16
15
(.002 – .006)
0.05 – 0.15
FE28 (EB) TSSOP 0204
(.047)
(.108)
MAX
1.20
2.74
(.252)
6.40
BSC
3640p