MVR1251T-251ML Datasheet, PDF (1/3 Pages) Coilcraft lnc. – VRM/ VRD Power Inductors

Document 420-1
VRM/ VRD Power Inductors – MVR
The MVR series provides greater current handling ca-
pability than any other power inductor its size. While
requiring only one square centimeter of board space,
this inductor can handle up to 36 Amps of current.
These shielded inductors were developed for multi-
phase voltage regulators and are ideal for use in DC-
DC converters, battery-powered devices and high cur-
rent power supplies. Their flat wire construction en-
sures very low DC resistance and offers an excellent
performance-to-height ratio. The materials used in these
parts eliminate all thermal aging issues.
The MVR12xxT is a high efficiency part that features
very low core loss. The MVR12xxC provides soft satu-
ration and is unaffected by part temperature up to 125°C.
Refer to the comparison curves for L vs Current and
ESR vs Frequency for performance differences.
For free evaluation samples, contact Coilcraft or order
them online at www.coilcraft.com.
Part number¹
Low core loss
MVR1251T-251ML_
MVR1251T-361ML_
MVR1251T-561ML_
Soft saturation
MVR1247C-361ML_
MVR1255C-651ML_
MVR1261C-112ML_
MVR1271C-162ML_
MVR1278C-232ML_
L² DCR SRF³
Height
±20% ±8% typ Isat⁴ Irms⁵ max
(µH) (mOhm) (MHz) (A) (A) (mm)
0.25 0.925 160 35 25 5.1
0.36 0.925 140 24 24 5.1
0.56 0.925 110 13 25 5.1
0.36 0.925 120 36 24 4.7
0.65 1.50 115 24 19 5.5
1.10 1.95
95 20 20 6.1
1.65 2.53
55 17 20 7.1
2.30 3.08
50 16 17 7.8
1. When ordering, please specify termination and packaging codes:
MVR1278C-232MLC
Termination: L = RoHS compliant tin-silver over copper.
Special order: T = RoHS tin-silver-copper (95.5/4/0.5)
or S = non-RoHS tin-lead (63/37).
Packaging: C = 7″ machine-ready reel. EIA-481 embossed plastic
tape.
B = Less than full reel. In tape, but not machine ready.
To have a leader and trailer added ($25 charge), use
code letter C instead.
D = 13″ machine-ready reel. EIA-481 embossed plastic
tape. Factory order only, not stocked.
2. Inductance measured at 500 kHz, 0.1 Vrms, 0 Adc using a Coilcraft
SMD-A fixture in an Agilent/HP 4284A LCR meter or equivalent.
3. SRF measured on an Agilent/HP 8753ES.
4. DC current at which the inductance drops 30% (typ) for MVR12xxC and
20% (typ) for MVR12xxT from its value without current.
5. Current that causes a 40°C temperature rise from 25°C ambient.
6. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Core material MVRxxxT: Ferrite; MVRxxxxC: Powdered iron
Core and winding loss See www.coilcraft.com/coreloss
Terminations RoHS compliant tin-silver over copper. Other
terminations available at additional cost.
Weight MVRT: 2.1 g; MVRC: 2.45 – 3.86 g
Ambient temperature –40°C to +85°C with Irms current, +85°C to
+125°C with derated current
Storage temperature Component: –40°C to +125°C.
Packaging: –40°C to +80°C
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
MVR1247 200/7″ reel; 900/13″ reel
MVR1251 175/7″ reel; 700/13″ reel
MVR1255 175/7″ reel; 700/13″ reel
MVR1261 175/7″ reel; 700/13″ reel
MVR1271 100/7″ reel; 500/13″ reel
MVR1278 100/7″ reel; 500/13″ reel
Plastic tape: 24 mm wide, 16 mm pocket spacing
MVR1247 0.35 mm thick, 4.5 mm pocket depth
MVR1251 0.4 mm thick, 6.1 mm pocket depth
MVR1255 0.4 mm thick, 6.1 mm pocket depth
MVR1261 0.4 mm thick, 6.1 mm pocket depth
MVR1271 0.4 mm thick, 7.5 mm pocket depth
MVR1278 0.4 mm thick, 7.5 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 420-1 Revised 10/20/08
© Coilcraft, Inc. 2009