Document 703-1
Coupled Inductors – MSD1260T
For high temperature
applications
The MSD1260T series of shielded coupled inductors
was designed specifically for high temperature applica-
tions – up to 125°C. The excellent coupling coefficient
(k
≥
0.94) makes it ideal for use in SEPIC applications.
In SEPIC topologies, the required inductance for each
winding in a coupled inductor is half the value needed
for two separate inductors, allowing selection of a part
with lower DCR and higher current handling.
These parts provide high inductance, high efficiency and
excellent current handling in a rugged, low cost part.
They are well suited for use as VRM inductors in high-
current DC-DC and VRM/VRD controllers.
They can also be used as two single inductors con-
nected in series or parallel, or as 1 : 1 transformers.
0.484
max
12,3
D1
+
L1
C1
Dot indicates pin1
Dash number
Internal code
+
+
V
OUT
0.484
max
12,3
123
X
V
IN
Q1
L2
C2
Load
–
–
Typical SEPIC schematic
0.236 ±0.008
6,0 ±0,2
Refer to Application Note, Document 639,
“Selecting Coupled Inductors for SEPIC Applications”
Recommended
Land Pattern
0.197
5,0
0.138
3,5
0.157
4,0
2
3
0.217
5,5
0.197
5,0
3
2
4
1
0.177
4,5
4
1
0.059
1,5
0.079
2,0
inches
Dimensions are in
mm
1
L1
3
2
L2
4
Core material
Ferrite
Terminations
RoHS compliant matte tin over nickel over phos
bronze. Other terminations available at additional cost.
Weight:
2.8 – 3.2 g
Ambient temperature
–40°C to +125°C with
Irms
current, +125°C
to +165°C with derated current
Storage temperature
Component: –40°C to +165°C.
Packaging: –40°C to +80°C
Winding to winding isolation
500 Vrms
Resistance to soldering heat
Max three 40 second reflows at
+260°C, parts cooled to room temperature between cycles
Moisture Sensitivity Level (MSL)
1 (unlimited floor life at <30°C /
85% relative humidity)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332
Packaging
500/13″ reel; Plastic tape: 24 mm wide, 0.35 mm thick,
16 mm pocket spacing, 6.6 mm pocket depth
PCB washing
Only pure water or alcohol recommended
Specifications subject to change without notice.
Please check our website for latest information.
Document 703-1
Revised 08/28/09
© Coilcraft, Inc. 2009
COILCRAFT [ Coilcraft lnc. ]
