Datasheet

LTM4620A
38
4620afb
For more information www.linear.com/LTM4620A
PACKAGE DESCRIPTION
Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
PACKAGE BOTTOM VIEW
PIN 1
SUGGESTED PCB LAYOUT
TOP VIEW
BGA 144 1112 REV B
TRAY PIN 1
BEVEL
PACKAGE IN TRAY LOADING ORIENTATION
COMPONENT
PIN “A1”
0.0000
0.0000
DETAIL A
Øb (144 PLACES)
A
DETAIL B
PACKAGE SIDE VIEW
Z
M
X YZddd
M
Zeee
0.630 ±0.025 Ø 144x
e
b
A2
F
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
LTMXXXXXX
µModule
BGA Package
144-Lead (15mm × 15mm × 5.01mm)
(Reference LTC DWG # 05-08-1880 Rev B)
DETAIL B
SUBSTRATE
A1
b1
ccc Z
MOLD
CAP
// bbb Z
Z
H2
H1
NOTES: 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M-1994 2. ALL DIMENSIONS ARE IN MILLIMETERS BALL DESIGNATION PER JESD MS-028 AND JEP95 5. PRIMARY DATUM -Z- IS SEATING PLANE 6. SOLDER BALL COMPOSITION IS 96.5% Sn/3.0% Ag/0.5% Cu
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
SYMBOL
A
A1 A2
b
b1
D
E
e F
G
H1 H2
aaa
bbb
ccc
ddd
eee
MIN
4.81 0.50 4.31 0.60 0.60 0.36 3.95
NOM
5.01 0.60 4.41 0.75 0.63
15.00 15.00
1.27
13.97 13.97
0.41 4.00
MAX
5.21 0.70 4.51 0.90 0.66 0.46 4.05 0.15 0.10 0.20 0.30 0.15
NOTES
DIMENSIONS
TOTAL NUMBER OF BALLS: 144
PACKAGE TOP VIEW
4
PIN “A1”
CORNER
DETAIL A
3
SEE NOTES
L K J H G F E D C B M A
1234567810 91112
X
Y
aaa Z
aaa Z
E
D
b
e
G
7 PACKAGE ROW AND COLUMN LABELING MAY VARY
AMONG µModule PRODUCTS. REVIEW EACH PACKAGE LAYOUT CAREFULLY
!
7
SEE NOTES