SW Series • Inductors for National's 150kHz Simple SwitcherTM
SW Series low costtoroidal inductors, designed for use with
National Semiconductor's 150kHz Simple Switcher TM Part
Numbers LM259X-L1 through LM259X-L44 and LM258X-L
AMGIS
Date Code
SWS-xxx-xx
Features
• High energy storage with minimum saturation
• High stability from no load to full load
AMGIS
Date Code
SWT-xxx-xx
• Available in both SMD and TH versions
• Manufactured in ISO-9001 approved facility
• Operating temperature range: -40°C to +125°C
Electrical Specifications at 25°C ambient
Part Number
SW_-0.13-259
National
Part
Number
LM-259X-L1
Rated
Current
(iDC)
LN (µH)
± 20%
ETOP
(V-µSec)
Max.
DCR
(Ohms)
Energy
Storage
(µJ)
0.13
259
23.1
3.40
2
SW_-0.16-178
LM-259X-L2
0.16
178
16.5
2.80
2
SW_-0.20-118
LM-259X-L3
0.20
118
13.2
1.80
2
SW_-0.25-79
LM-259X-L4
0.25
79
9.9
1.50
2
SW_-0.30-55
LM-259X-L5
0.30
55
6.6
1.00
2
SW_-0.34-39
LM-259X-L6
0.34
39
6.6
0.80
2
SW_--0.45-26
LM-259X-L7
0.45
26
6.6
0.62
3
SW_-0.20-374
LM-259X-L8
0.20
374
75.9
2.70
7
SW_-0.25-256
LM-259X-L9
0.25
256
33.0
2.20
8
SW_-0.30-176
LM-259X-L10
0.30
176
26.4
1.40
8
SW_-0.38-118
LM-259X-L11
0.38
118
19.8
1.20
9
SW_-0.46-78
LM-259X-L12
0.46
78
16.5
0.80
8
SW_-0.56-55
LM-259X-L13
0.56
55
13.2
0.50
9
SW_-0.68-39
LM-259X-L14
0.68
39
9.9
0.30
9
SW_-0.84-26
LM-259X-L15
0.84
26
6.6
0.20
9
SW_-1.02-17
LM-259X-L16
1.02
17
6.6
0.10
9
SW_-0.36-375
LM-259X-L17
0.36
375
75.9
1.30
24
SW_-0.44-252
LM-259X-L18
0.44
252
49.5
0.90
24
SW_-0.54-173
LM-259X-L19
0.54
173
36.3
0.60
25
SW_-0.67-115
LM-259X-L20
0.67
115
29.7
0.40
26
SW_-0.82-78
LM-259X-L21
0.82
78
23.1
0.30
26
SW_-1.0-54
LM-259X-L22
1.00
54
16.5
0.20
27
SW_-1.2-38
LM-259X-L23
1.20
38
13.2
0.10
27
SW_-1.48-26
LM-259X-L24
1.48
26
9.9
0.10
28
SW_-1.81-18
LM-259X-L25
1.81
18
9.9
0.06
29
SW_-0.68-377
LM-259X-L26
0.68
377
75.9
1.00
87
SW_-0.83-248
LM-259X-L27
0.83
248
72.6
0.60
85
SW_-1.02-168
LM-259X-L28
1.02
168
56.1
0.40
87
SW_-1.26-112
LM-259X-L29
1.26
112
42.9
0.30
89
SW_-1.54-77
LM-259X-L30
1.54
77
33.0
0.20
91
SW_-1.87-53
LM-259X-L31
1.87
53
26.4
0.13
93
SW_-2.24-37
LM-259X-L32
2.24
37
19.8
0.10
93
SW_-2.74-24
LM-259X-L33
2.74
24
16.5
0.07
90
SW_-3.00-17
LM-259X-L34
3.00
17
13.2
0.05
77
SW_-1.5-250
LM-259X-L35
1.50
250
72.6
0.23
281
SW_-1.81-168
LM-259X-L36
1.81
168
75.9
0.18
275
P ackag e
"S"
" C " & " T"
S1
T1
S2
T2
S3
T3
S4
T4
S4
C1 - T4
S6
C3
AMGIS, LLC * 10830 Kinghurst Dr. Houston, TX 77099
Phone: 832-775-1319 * Fax: 281-933-9067* email: sales@amgistoroids.com
Toll Free: 877-762-6447 * www.amgistoroids.com
SW Series • Toroidal Inductors for National's 150kHz Simple SwitcherTM
Electrical Specifications at 25°C
National
Part
Number
Part Number
S W_-2.22-114
S W_-2.70-77
S W_-3.00-53
S W_-3.00-38
S W_-3.00-25
S W_-2.50-167
S W_-3.00-110
S W_-3.00-77
S W_-4.50-19
Rated
Current
(IDC)
LN (µH)
± 20%
ETOP
(V-µSec)
Max.
DCR
(Ohms)
Energy
Storage
(µJ)
2.22
2.70
3.00
3.00
3.00
2.50
3.00
3.00
4.50
114
77
53
38
25
167
110
77
19
62.7
52.8
42.9
29.7
19.8
75.9
75.9
59.4
32.0*
0.10
0.09
0.08
0.05
0.04
0.14
0.09
0.08
0.02
281
281
239
171
113
522
495
347
192
LM-259X-L37
LM-259X-L38
LM-259X-L39
LM-259X-L40
LM-259X-L41
LM-259X-L42
LM-259X-L43
LM-259X-L44
LM-258X-L
P ackag e
"S"
" C " & " T"
S6
C3
S5
T5 - C2
C4
S6
C3
*Note: E TOP for P /N S W_-4.50-19 i s based on a frequency of 100kHz. A ll other i tems are rated at 150kHz.
S i mple S wi tcherTM i s a trademark of Nati onal S emi conductor C orporati on.
Dimensions
Type SWS - Surface Mount
D
A
B
D
Type SWT -Through Hole Mount
Sizes T1 -T4
Suggested Pad
Layout
(Top side View)
2
Pad Width
S6
S1 - S5
0.079
0.059
(2.00)
(1.50)
AMGIS
E
AMGIS
Date Code
SWT-xxx-xx
A D
D
E
Date Code
SWS-xxx-xx
D
1
E
Suggested Pad
Layout
Size T5
0.035
(0.90)
Schematic
1
C
2
B
Schematic
AMGIS
1
Date Code
SWT-xxx-xx
D
2
D
Surface Coplanarity will be
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