FAN5355 Fairchild Semiconductor, FAN5355 Datasheet - Page 24

• Manufacturer Part Number: FAN5355
• Description: The FAN5355 device is a high-frequency, ultra-fast transient response, synchronous step-down DC-DC converter optimized for low-power applications using small, low-cost inductors and capacitors
• Manufacturer: Fairchild Semiconductor

© 2008 Fairchild Semiconductor Corporation
FAN5355 • Rev. 1.1.0
Physical Dimensions
Product-Specific Dimensions
Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without
notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most
recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty
therein, which covers Fairchild products.
Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:
http://www.fairchildsemi.com/packaging/.
FAN5355UC
Product
(Y)+/-.018
INDEX AREA
BALL A1
2X
D
0.05 C
0.03 C
0.50
0.50
C
Figure 47. 12-Bump, Wafer-Level Chip-Scale Package (WLCSP), 0.5mm Pitch
BOTTOM VIEW
TOP VIEW
1 2
E
2.200 ±0.030
3
SEATING PLANE
D
D
C
B
A
(X)+/-.018
A
12 X Ø0.315 +/- .025
0.625
0.539
0.06 C
D
B
0.005
2X
0.03 C
C A B
SIDE VIEWS
1.430 ±0.030
E
24
C. DIMENSIONS AND TOLERANCES PER
D
G. DRAWING FILENAME: MKT-UC012AArev2
A. NO JEDEC REGISTRATION APPLIES
F
F. BALL COMPOSITION: Sn95.5Ag3.9Cu0.6
B. DIMENSIONS ARE IN MILLIMETERS.
(Ø0.25)
Cu PAD
DATUM C, THE SEATING PLANE, IS DEFINED
BY THE SPHERICAL CROWNS OF THE BALLS.
FOR DIMENSIONS D, E, X, AND Y SEE
PRODUCT DATASHEET.
SAC405 ALLOY
ASME Y14.5M, 1994
RECOMMENDED LAND PATTERN (NSMD)
0.50
A1
0.332±0.018
0.220
X
0.50
1.00
(Ø0.35)
SOLDER MASK
OPENING
0.250±0.025
www.fairchildsemi.com
0.355
Y