(1/2)
SMD Inductors(Coils)
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
Part No.
VLF4012AT-1R5M1R6
VLF4012AT-2R2M1R5
VLF4012AT-3R3M1R3
VLF4012AT-4R7M1R1
VLF4012AT-6R8MR96
VLF4012AT-100MR79
VLF4012AT-150MR63
VLF4012AT-220MR51
VLF4012AT-330MR39
VLF4012AT-470MR30
∗
Conformity to RoHS Directive
SHAPES AND DIMENSIONS
3.5±0.3
4R7
3.7±0.3
1.2max.
(Include terminal area)
Dimensions in mm
RECOMMENDED PC BOARD PATTERN
1.3
2.9
4.7
Dimensions in mm
Inductance
(µH)
1.5
2.2
3.3
4.7
6.8
10
15
22
33
47
Inductance
tolerance(%)
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
Test frequency
(kHz)
100
100
100
100
100
100
100
100
100
100
DC resistance(Ω)
max.
0.079
0.087
0.12
0.16
0.23
0.35
0.53
0.82
1.4
2.3
typ.
0.069
0.076
0.1
0.14
0.2
0.3
0.46
0.71
1.2
2.0
Rated current(A)
∗
Based on inductance
change max.
1.8
1.5
1.3
1.1
0.96
0.80
0.63
0.52
0.44
0.36
Based on temperature
rise typ.
1.6
1.5
1.3
1.1
0.97
0.79
0.64
0.51
0.39
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)
TYPICAL ELECTRICAL CHARACTERISTICS
INDUCTANCE vs. DC SUPERPOSITION CHARACTERISTICS
VLF4012AT-1R5M1R6
2.0
Inductance(
µH
)
VLF4012AT-2R2M1R5
3.0
2.5
Inductance(
µH
)
1.5
1.0
0.5
0.0
0.0
2.0
1.5
1.0
0.5
0.2
0.4
0.6
0.8 1.0 1.2
DC current (A)
1.4
1.6
1.8
2.0
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.
• All specifications are subject to change without notice.
001-04 / 20060612 / e531_vlf4012a.fm
TDK [ TDK ELECTRONICS ]
