TDK VLF4012A User Manual
(1/2)
SMD Inductors(Coils)
Conformity to RoHS Directive
For Power Line(Wound, Magnetic Shielded)
VLF Series VLF4012A
FEATURES
• Miniature size
Mount area: 3.5× 3.7mm
Low profile: 1.2mm max. height
• Generic use for portable DC to DC converter line
• High magnetic shield construction should actualize high resolu-
tion for EMC protection.
• Available for automatic mounting in tape and real package.
• The products do not contain lead and support lead-free solder-
ing.
APPLICATIONS
DVCs, DSCs, PDAs, LCD displays, Cellular phones, HDDs, etc.
ELECTRICAL CHARACTERISTICS
Par t No.
VLF4012AT-1R5M1R6 1.5 ±20 100 0.079 0.069 1.8 1.6
VLF4012AT-2R2M1R5 2.2 ±20 100 0.087 0.076 1.5 1.5
VLF4012AT-3R3M1R3 3.3 ±20 100 0.12 0.1 1.3 1.3
VLF4012AT-4R7M1R1 4.7 ±20 100 0.16 0.14 1.1 1.1
VLF4012AT-6R8MR96 6.8 ±20 100 0.23 0.2 0.96 0.97
VLF4012AT-100MR79 10 ±20 100 0.35 0.3 0.80 0.79
VLF4012AT-150MR63 15 ±20 100 0.53 0.46 0.63 0.64
VLF4012AT-220MR51 22 ±20 100 0.82 0.71 0.52 0.51
VLF4012AT-330MR39 33 ±20 100 1.4 1.2 0.44 0.39
VLF4012AT-470MR30 47 ±20 100 2.3 2.0 0.36 0.30
∗
Rated current: Value obtained when current flows and the temperature has risen to 40°C or when DC current flows and the nominal value of inductance
has fallen by 30%, whichever is smaller.
• Operating temperature range: –40 to +105°C (Including self-temperature rise)
Inductance
(µH)
Inductance
tolerance(%)
Test frequency
(kHz)
SHAPES AND DIMENSIONS
4R7
3.5±0.3
3.7±0.3
1.2max.
(
Include terminal area
Dimensions in mm
RECOMMENDED PC BOARD PATTERN
1.3
2.9
4.7
DC resistance(Ω) Rated current(A)
max. typ.
Dimensions in mm
∗
Based on inductance
change max.
)
Based on temperature
rise typ.
TYPICAL ELECTRICAL CHARACTERISTICS
INDUCTANCE vs. DC SUPERPOSITION CHARACTERISTICS
VLF4012AT-1R5M1R6 VLF4012AT-2R2M1R5
2.0
)
1.5
µH
(
1.0
Inductance
0.5
0.0
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
DC current(A
• Conformity to RoHS Directive: This means that, in conformity with EU Directive 2002/95/EC, lead, cadmium, mercury, hexavalent chromium, and specific
bromine-based flame retardants, PBB and PBDE, have not been used, except for exempted applications.
)
3.0
2.5
)
µH
2.0
(
1.5
1.0
Inductance
0.5
0.0
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
DC current(A
)
• All specifications are subject to change without notice.
001-04 / 20060612 / e531_vlf4012a.fm
TYPICAL ELECTRICAL CHARACTERISTICS
INDUCTANCE vs. DC SUPERPOSITION CHARACTERISTICS
VLF4012AT-3R3M1R3 VLF4012AT-4R7M1R1
4.0
)
3.0
µH
(
2.0
Inductance
1.0
0.0
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8
DC current(A
)
6.0
5.0
)
µH
4.0
(
3.0
2.0
Inductance
1.0
0.0
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
VLF4012AT-6R8MR96 VLF4012AT-100MR79
8.0
)
6.0
µH
(
4.0
2.0
Inductance
0.0
0.0 0.2 0.4 0.6 0.8 1.0 1.2
DC current(A
)
12
10
)
8
µH
(
6
4
Inductance
2
0
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
DC current(A
DC current(A
(2/2)
)
)
VLF4012AT-150MR63 VLF4012AT-220MR51
20
)
15
µH
(
10
Inductance
5
0
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
DC current(A
)
30
25
)
20
µH
(
15
10
Inductance
5
0
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
VLF4012AT-330MR39 VLF4012AT-470MR30
50
40
)
µH
(
30
20
Inductance
10
0
0.0 0.1 0.2 0.3 0.4 0.5 0.6
DC current(A
)
60
50
)
40
µH
(
30
20
Inductance
10
0
0.0 0.1 0.2 0.3 0.4 0.5
TEST CIRCUIT
A
1: LCR meter 4285A=100kHz
2: DC constant current
C=20,000µF
L=0.1H
12
Sample
DC current(A
DC current(A
)
)
• All specifications are subject to change without notice.
001-04 / 20060612 / e531_vlf4012a.fm
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