ltc3851-1 Linear Technology Corporation, ltc3851-1 Datasheet - Page 27

• Manufacturer Part Number: ltc3851-1
• Description: Synchronous Step-down Switching Regulator Controller
• Manufacturer: Linear Technology Corporation

PACKAGE DESCRIPTION
3.50 0.05
2.10 0.05
1.45 0.05
(4 SIDES)
NOTE:
1. DRAWING CONFORMS TO JEDEC PACKAGE OUTLINE MO-220 VARIATION (WEED-2)
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
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
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
ON THE TOP AND BOTTOM OF PACKAGE
(.0120 .0015)
0.305 0.038
TYP
GAUGE PLANE
NOTE:
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
(.007)
0.18
RECOMMENDED SOLDER PAD LAYOUT
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
(.206)
5.23
MIN
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.
2.845 0.102
0.254
(.010)
(.112 .004)
0.50 BSC
0.25 0.05
DETAIL “A”
0.70 0.05
DETAIL “A”
1.651 0.102
(.065 .004)
16-Lead Plastic MSOP, Exposed Die Pad
PACKAGE
OUTLINE
(.0197)
(Reference LTC DWG # 05-08-1667 Rev A)
0 – 6 TYP
0.50
BSC
16-Lead Plastic QFN (3mm × 3mm)
(Reference LTC DWG # 05-08-1691)
(.021 .006)
0.53 0.152
0.889 0.127
(.035 .005)
(.126 – .136)
3.20 – 3.45
SEATING
PLANE
PIN 1
TOP MARK
(NOTE 6)
MSE Package
3.00 0.10
(4 SIDES)
UD Package
(.007 – .011)
0.17 – 0.27
(.193 .006)
4.90 0.152
TYP
(.043)
MAX
1.10
EXPOSED PAD OPTION
(.0197)
1
0.50
BSC
16
16151413121110
BOTTOM VIEW OF
1 2 3 4 5 6 7 8
2.845
4.039 0.102
(.112 .004)
(.159 .004)
(NOTE 3)
0.75 0.05
0.102
9
9
8
DETAIL “B”
(.118 .004)
3.00 0.102
1.651 0.102
(.065 .004)
1.45 0.10
(NOTE 4)
(4-SIDES)
0.280 0.076
(.011 .003)
MSOP (MSE16) 0608 REV A
0.200 REF
0.00 – 0.05
(.034)
0.86
REF
0.1016 0.0508
(.004 .002)
REF
NO MEASUREMENT PURPOSE
THE LEADFRAME FEATURE.
CORNER TAIL IS PART OF
FOR REFERENCE ONLY
BOTTOM VIEW—EXPOSED PAD
R = 0.115
DETAIL “B”
TYP
0.12 REF
15 16
0.35
REF
LTC3851-1
0.50 BSC
0.25 0.05
1
2
(UD16) QFN 0904
0.40 0.10
PIN 1 NOTCH R = 0.20 TYP
OR 0.25 45 CHAMFER
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