®
DRQ Series
Dual Winding, Shielded
Inductors/Transformer
Description
• 125C maximum total temperature operation
• Dual winding inductors that can be used as either a
single inductor, or in coupled inductor/transformer
applications (1:1 turns ratio)
• Four sizes of shielded drum core inductors
• Windings can be connected in series or parallel, offering
a broad range of inductance and current ratings
• Peak current ratings from 0.13 Amps to 56 Amps
• RMS current ratings from 0.128 Amps to 17.9 Amps
• Inductance ratings from 0.33µH to 4.02mH
• Surface Mount
• 200 VAC Isolation between windings
• RoHS compliant (-R option)
Applications
Packaging
• As a transformer: SEPIC, flyback
• As an inductor: Buck, boost, coupled inductor
• DC/DC converters
• VRM inductor for CPU and DDR power supplies
• Input and output filter chokes
• Supplied in tape and reel packaging, 1350 (DRQ73),
1100 (DRQ74), 600 (DRQ125), and 350 (DRQ127)
per reel
Environmental Data
• Storage temperature: -40°C to +125°C
• Operating temperature: -40°C to +125°C (Range is
application specific).
• IR reflow temperature: 240°C for 30 seconds max.
Parallel Ratings
Series Ratings
Part Number
Rated
Inductance
(µH)
OCL (1)
+/-20%
(µH)
I rms (2)
Amperes
I sat (3) DCR Ω (4)
Volt (5)
µ-Sec
OCL (1)
+/-20%
(µH)
I rms (2)
Amperes
I sat (3)
Amperes
Peak
DCR Ω (4)
Volt (5)
µ-Sec
Amperes
Peak
typ.
typ.
DRQ73-R33
DRQ73-1R0
DRQ73-1R5
DRQ73-2R2
DRQ73-3R3
DRQ73-4R7
DRQ73-6R8
DRQ73-8R2
DRQ73-100
DRQ73-150
DRQ73-220
DRQ73-330
DRQ73-470
DRQ73-680
DRQ73-820
DRQ73-101
DRQ73-151
DRQ73-221
DRQ73-331
DRQ73-471
DRQ73-681
DRQ73-821
DRQ73-102
0.33
1.00
1.50
2.20
3.30
4.70
6.80
8.20
10.0
15.0
22.0
33.0
47.0
68.0
82.0
100
150
220
330
470
680
820
1000
0.306
0.992
1.482
2.070
3.540
4.422
6.480
8.930
10.30
15.01
22.65
34.41
48.62
68.91
80.37
101.4
150.9
223.3
325.5
465.8
676.5
821.7
995.0
6.19
5.25
4.64
4.11
3.31
3.09
2.55
2.19
2.08
1.83
1.62
1.31
1.08
0.89
0.86
0.73
0.58
0.52
0.42
0.35
0.29
0.27
0.26
14.4
7.97
6.52
5.52
4.22
3.78
3.12
2.66
2.47
2.05
1.67
1.35
1.14
0.96
0.89
0.79
0.65
0.53
0.44
0.37
0.31
0.28
0.25
0.0074
0.0103
0.0132
0.0167
0.0259
0.0297
0.0435
0.0592
0.0656
0.0844
0.107
0.166
0.241
0.358
0.384
0.527
0.851
1.05
1.98
3.56
4.36
5.15
6.73
7.52
9.11
10.7
11.5
13.9
17.0
21.0
24.9
29.7
32.1
36.0
44.0
53.5
64.5
77.2
93.1
103
1.224
3.968
5.928
8.280
14.16
17.69
25.92
35.72
41.20
60.04
90.60
137.6
194.5
275.6
321.5
405.6
603.6
893.2
1302
1863
2706
3287
3980
3.10
2.63
2.32
2.06
1.66
1.55
1.28
1.10
1.04
0.916
0.811
0.653
0.542
0.444
0.430
0.367
0.289
0.260
0.211
0.173
0.143
0.134
0.128
7.18
3.99
3.26
2.76
2.11
1.89
1.56
1.33
1.24
1.03
0.83
0.68
0.57
0.48
0.44
0.39
0.32
0.27
0.22
0.18
0.15
0.14
0.13
0.0296
0.0411
0.0527
0.0669
0.1035
0.1188
0.1742
0.2368
0.2623
0.339
0.429
0.665
0.965
1.43
1.54
2.11
3.41
4.20
6.36
9.44
13.88
15.72
17.36
3.96
7.12
8.72
10.3
13.5
15.0
18.2
21.4
23.0
27.8
34.0
42.0
49.8
59.4
64.2
72.0
88.0
107
1.59
2.36
3.47
3.93
129
154
186
206
4.34
113
226
1) Open Circuit Inductance Test Parameters: 100kHz, 0.25 Vrms, 0.0 Adc
Parallel: (1,2 - 4,2) Series: (1 - 4) tie (2 - 3)
2) RMS current for an approximate ∆T of 40°C without core loss. It is
recommended that the temperature of the part not exceed 125°C.
3) Peak current for approximately 30% roll-off at 20°C
4) DCR limits @ 20°C
5) Applied Volt-Time product (V-µS) across the inductor. This value represents the
applied V-µS at 100KHz necessary to generate a core loss equal to 10% of the
total losses for a 40°C temperature rise.
6) Turns Ratio (1-2):(3-4) 1:1
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