LTC3834 Linear Technology, LTC3834 Datasheet - Page 27

• Manufacturer Part Number: LTC3834
• Description: Synchronous Step-Down Controller
• Manufacturer: Linear Technology

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PACKAGE DESCRIPTION
4.50 0.05
3.10 0.05
1.50 REF
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
NOTE:
1. DRAWING PROPOSED TO BE MADE A JEDEC PACKAGE OUTLINE MO-220 VARIATION (WXXX-X).
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
2.65 0.05
6.60 0.10
0.50 BSC
0.25 0.05
(.0035 – .0079)
0.09 – 0.20
NOTE:
1. CONTROLLING DIMENSION: MILLIMETERS
2. DIMENSIONS ARE IN
3. DRAWING NOT TO SCALE
3.65 0.05
4.10 0.05
5.50 0.05
2.50 REF
4.50 0.10
RECOMMENDED SOLDER PAD LAYOUT
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
(.169 – .177)
4.30 – 4.50*
(.020 – .030)
0.50 – 0.75
SEE NOTE 4
(.152)
MILLIMETERS
3.86
(INCHES)
0.70 0.05
0.65 BSC
PACKAGE
OUTLINE
(Reference LTC DWG # 05-08-1711 Rev B)
20-Lead Plastic QFN (4mm × 5mm)
20-Lead Plastic TSSOP (4.4mm)
5.00 0.10
0.45 0.05
(Reference LTC DWG # 05-08-1663)
(2 SIDES)
Exposed Pad Variation CB
(.108)
0.25
REF
2.74
1.05 0.10
0 – 8
*DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH
4. RECOMMENDED MINIMUM PCB METAL SIZE
SHALL NOT EXCEED 0.150mm (.006") PER SIDE
FOR EXPOSED PAD ATTACHMENT
UFD Package
FE Package
PIN 1
TOP MARK
(NOTE 6)
4.00 0.10
(2 SIDES)
(.0256)
0.65
BSC
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
20 1918 17 16 15
1
(.0077 – .0118)
ON THE TOP AND BOTTOM OF PACKAGE
0.195 – 0.30
2
TYP
3 4 5 6 7 8 9 10
(.252 – .260)
6.40 – 6.60*
(.152)
3.86
0.200 REF
0.00 – 0.05
0.75 0.05
14 13
12
11
2.50 REF
FE20 (CB) TSSOP 0204
(.002 – .006)
0.05 – 0.15
R = 0.05 TYP
(.108)
(.047)
2.74
MAX
1.20
R = 0.115
(.252)
6.40
BSC
TYP
BOTTOM VIEW—EXPOSED PAD
3.65 0.10
2.65 0.10
1.50 REF
19
LTC3834
20
0.50 BSC
0.25 0.05
PIN 1 NOTCH
R = 0.20 OR
C = 0.35
(UFD20) QFN 0506 REV B
27
1
2
0.40 0.10
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