INDUCTORS
Inductors Designed for
8540-8548
Nationals’ 150 KHz SIMPLE SWITCHER
TM
• Designed for use with National Semiconductor LM 259X series
• Compact size and low cost
• Meets flammability rating of UL 94V-0
MECHANICAL AND SCHEMATIC
(All dimensions in inches)
SUGGESTED PAD LAYOUT
SCHEMATIC
ELECTRICAL SPECIFICATION @ 25˚C
Part
Number
8540
8541
8542
8540-8548
Nominal
Inductance
(µH)
17
24
37
53
77
11 2
168
248
377
Rated
Current
(Amps DC)
3.00
2.74
2.24
1.87
1.54
1.26
1.02
0.83
0.68
Nominal
DCR
(Ω)
0.05
0.07
0.10
0.13
0.20
0.30
0.40
0.60
1.00
8543
8544
8545
05/01
8546
8547
ISSUE: A
8548
NOTES:
1. SIMPLE SWITCHER
TM
is a trademark of National Semiconductor Corporation.
2. Inductance values are ±20%.
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