(1/2)
SMD Inductors(Coils)
For Power Line(Wound, Magnetic Shielded)
Conformity to RoHS Directive
VLF Series VLF4012A
3.5±0.3
SHAPES AND DIMENSIONS
4R7
1.2max.
(Include terminal area)
Dimensions in mm
3.7±0.3
RECOMMENDED PC BOARD PATTERN
1.3
FEATURES
• 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 resolution for EMC protection.
• Available for automatic mounting in tape and real package.
• The products contain no lead and also support lead-free
soldering.
• It is a product conforming to RoHS directive.
2.9
APPLICATIONS
Power souce inductor for mobile devices such as mobile phones,
HDDs, and DSCs
4.7
Dimensions in mm
ELECTRICAL CHARACTERISTICS
Part No.
VLF4012AT-1R5M1R6
VLF4012AT-2R2M1R5
VLF4012AT-3R3M1R3
VLF4012AT-4R7M1R1
VLF4012AT-6R8MR96
VLF4012AT-100MR79
VLF4012AT-150MR63
VLF4012AT-220MR51
VLF4012AT-330MR39
VLF4012AT-470MR30
Inductance
[at 1/2 Idc1]∗2
(µH)
1.5
2.2
3.3
4.7
6.8
10
15
22
33
47
Inductance
tolerance(%)
Test frequency
(kHz)
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
100
100
100
100
100
100
100
100
100
100
DC resistance(Ω)
max.
typ.
0.079
0.087
0.12
0.16
0.23
0.35
0.53
0.82
1.4
2.3
0.069
0.076
0.1
0.14
0.2
0.3
0.46
0.71
1.2
2.0
Rated current∗1(A)
Based on inductance
change Idc1 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 Idc2 typ.
1.6
1.5
1.3
1.1
0.97
0.79
0.64
0.51
0.39
0.30
∗1
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.
∗2 Inductance is at 1/2 Idc1 power distribution. The L vaule at 0A is higher than the guaranteed performance.
• Operating temperature range: –40 to +105°C (Including self-temperature rise)
TYPICAL ELECTRICAL CHARACTERISTICS
INDUCTANCE vs. DC SUPERPOSITION CHARACTERISTICS
VLF4012AT-1R5M1R6
VLF4012AT-2R2M1R5
3.0
2.0
Inductance(µH)
Inductance(µH)
2.5
1.5
1.0
0.5
2.0
1.5
1.0
0.5
0.0
0.0
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.
002-03 / 20080629 / e531_vlf4012a.fm
