Datasheet

LTM4615
21
4615fb
For more information www.linear.com/LTM4615
package DescripTion
LGA Package
144-Lead (15mm × 15mm × 2.82mm)
(Reference LTC DWG # 05-08-1816 Rev C)
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
NOTES: 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M-1994 2. ALL DIMENSIONS ARE IN MILLIMETERS BALL DESIGNATION PER JESD MS-028 AND JEP95
4 3
DETAILS OF PIN #1 IDENTIFIER ARE OPTIONAL, BUT MUST BE LOCATED WITHIN THE ZONE INDICATED. THE PIN #1 IDENTIFIER MAY BE EITHER A MOLD OR MARKED FEATURE
PACKAGE TOP VIEW
4
PIN “A1”
CORNER
X
Y
aaa Z
aaa Z
PACKAGE BOTTOM VIEW
3
SEE NOTES
SUGGESTED PCB LAYOUT
TOP VIEW
LGA 144 1112 REV C
LTMXXXXXX
µModule
TRAY PIN 1
BEVEL
PACKAGE IN TRAY LOADING ORIENTATION
COMPONENT
PIN “A1”
0.0000
0.0000
D
E
b
e
e
b
F
G
0.6350 0.6350 1.9050 1.9050 3.1750 3.1750 4.4450 4.4450 5.7150 5.7150 6.9850
6.9850
6.9850
5.7150
5.7150
4.4450
4.4450
3.1750
3.1750
1.9050
1.9050
0.6350
0.6350
6.9850
DETAIL B
PACKAGE SIDE VIEW
bbb Z
SYMBOL
A
b
D
E
e F
G
H1 H2
aaa
bbb
eee
MIN
2.72 0.60 0.27 2.45
NOM
2.82 0.63
15.00 15.00
1.27
13.97 13.97
0.32 2.50
MAX
2.92 0.66 0.37 2.55 0.15 0.10 0.05
NOTES
DIMENSIONS
TOTAL NUMBER OF LGA PADS: 144
DETAIL B
SUBSTRATE
MOLD
CAP
Z
H2
H1
A
DIA 0.630 PAD 1
3x, C (0.22 x45°)
DETAIL A
0.630 ±0.025 SQ. 143x
S
YXeee
DETAIL A
F G H M L J K E A B C D
2 14 356712 891011
7
SEE NOTES
7 PACKAGE ROW AND COLUMN LABELING MAY VARY
AMONG µModule PRODUCTS. REVIEW EACH PACKAGE LAYOUT CAREFULLY
!
5. PRIMARY DATUM -Z- IS SEATING PLANE 6. THE TOTAL NUMBER OF PADS: 144