Linear Technology LTC1877 Demo Manual page 8

DEMO MANUAL DC290
NO-DESIGN SWITCHER
U
PCB LAYOUT A D FIL
Silkscreen Top
Paste Mask Top
U
PC FAB DRAWI G
C
B
D
B
Linear Technology Corporation
8
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 FAX: (408) 434-0507 www.linear-tech.com
W
2.000
2.000
A D
C
Component Side
Solder Side
NOTES: UNLESS OTHERWISE SPECIFIED
1. MATERIAL; FR4 OR EQUIVALENT EPOXY, 2 OZ COPPER CLAD
THICKNESS 0.031 ± 0.006 TOTAL OF 2 LAYERS
2. FINISH: ALL PLATED HOLES 0.001 MIN/0.0015 MAX COPPER PLATE
ELECTRODEPOSITED TIN-LEAD COMPOSITION
BEFORE REFLOW, SOLDER MASK OVER BARE COPPER (SMOBC)
3. SOLDER MASK; BOTH SIDES USING GREEN PC-401 OR EQUIVALENT
4. SILKSCREEN; USING WHITE NONCONDUCTIVE EPOXY INK
5. ALL DIMENSIONS ARE IN INCHES
6. SCORING:
0.017
SYMBOL
A
B
C
D
Solder Mask Top
Solder Mask Bottom
NUMBER
DIAMETER OF HOLES PLATED
0.020 10 YES
0.040 14 YES
0.072 2 NO
0.095 7 YES
dc290 LT/TP 0500 500 • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2000