Document 420-1 VRM/ VRD Power Inductors – MVR The MVR series provides greater current handling capability 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. MVR1251T only These shielded inductors were developed for multi-phase voltage regulators and are ideal for use in DC-DC converters, battery-powered devices and high current power supplies. Their flat wire construction ensures very low DC resistance and offers an excellent performance-toheight 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 saturation 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. L2DCR SRF3 Height ±20%±8% typ Isat4 Irms5 max Part number1 (µH)(mOhm)(MHz) (A) (A) (mm) Low core loss MVR1251T-251ML_0.25 MVR1251T-361ML_0.36 MVR1251T-561ML_0.56 Soft saturation MVR1247C-361ML_0.36 MVR1255C-651ML_0.65 MVR1261C-112ML_1.10 MVR1271C-162ML_1.65 MVR1278C-232ML_2.30 0.925 160 35 25 0.925 140 24 24 0.925 110 13 25 5.1 5.1 5.1 0.925 120 1.50 115 1.95 95 2.53 55 3.08 50 4.7 5.5 6.1 7.1 7.8 36 24 20 17 16 24 19 20 20 17 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. Tape and reel 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 MVR1251 MVR1255 MVR1261 MVR1271 MVR1278 200/7″ reel; 900/13″ reel 175/7″ reel; 700/13″ reel 175/7″ reel; 700/13″ reel 175/7″ reel; 700/13″ reel 100/7″ reel; 500/13″ reel 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 Tested with pure water or alcohol only. For other solvents, see Doc787_PCB_Washing.pdf. US +1-847-639-6400 [email protected] UK +44-1236-730595 [email protected] Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] Document 420-1 Revised 07/13/11 © Coilcraft Inc. 2013 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information. Document 420-2 MVR Series – VRM/ VRD Power Inductors Current Derating Temperature Rise vs Current 100 90 80 70 MVRT 60 50 40 30 20 10 0 Isat Irms -40 -20 0 20 40 60 80 100 120 140 Temperature rise (from 25°C) 80 MVRC 25°C Percent of rated current 120 110 MVR12xxC MVR12xxT 70 0.65 µH 1.10 µH 1.65 µH 0.36 µH 60 2.3 µH 0.25 µH 0.36 µH 0.56 µH 50 40 30 20 10 0 0 5 10 Ambient temperature (°C) 15 20 25 30 35 Current (A rms) L vs Current Comparison – 0.36 µH Inductance (µH) 0.5 0.4 MVR1251T-361 MVR1247C-361 0.3 0.2 0.1 0.1 10 1 100 Current (A) Equivalent Series Resistance (Ohms) ESR vs Frequency Comparison – 0.36 µH 10 9 8 Dimensions are in 7 6 MVR1247C-361 5 MVR1251T-361 4 3 2 1 0 0.1 1 10 inches mm Height (in. / mm)Length (in. / mm) Body size typ max typ max MVR1247 0.171 / 4,35 0.185 / 4,70 0.448 / 11,37 0.453 / 11,50 MVR1251 0.181 / 4,61 0.200 / 5,10 0.439 / 11,14 0.453 / 11,50 MVR1255 0.207 / 5,25 0.217 / 5,50 0.448 / 11,37 0.453 / 11,50 MVR1261 0.232 / 5,90 0.240 / 6,10 0.448 / 11,37 0.453 / 11,50 MVR1271 0.262 / 6,65 0.280 / 7,10 0.448 / 11,37 0.453 / 11,50 MVR1278 0.287 / 7,29 0.307 / 7,80 0.448 / 11,37 0.453 / 11,50 100 Frequency (MHz) US +1-847-639-6400 [email protected] UK +44-1236-730595 [email protected] Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] Document 420-2 Revised 07/13/11 © Coilcraft Inc. 2013 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information. Document 420-3 MVR Series – VRM/ VRD Power Inductors MVR12xxTMVR12xxC L vs Frequency 3.0 3.0 2.5 2.5 Inductance (µH) Inductance (µH) MVR1251T only L vs Frequency 2.0 1.5 1.0 0 0.36 µH 0.25 µH 0.1 10 1 2.30 µH 1.5 1.65 µH 1.0 1.10 µH 0.65 µH 0.36 µH 0.5 0.56 µH 0.5 2.0 0 100 0.1 3.0 3.0 2.5 2.5 2.0 1.5 1.0 0.56 µH 0.36 µH 0.25 µH 0.5 0 0.1 100 L vs Current Inductance (µH) Inductance (µH) L vs Current 10 1 Frequency (MHz) Frequency (MHz) 10 1 2.0 2.30 µH 1.5 1.65 µH 1.0 1.10 µH 0.5 0 100 0.65 µH 0.36 µH 0.1 10 1 Current (A) 100 Current (A) ESR vs Frequency ESR vs Frequency Equivalent Series Resistance (Ohms) Equivalent Series Resistance (Ohms) Inductance vs current is unaffected by part temperature up to 125°C. 10 9 0.56 µH 8 0.36 µH 7 6 5 0.25 µH 4 3 2 1 0 0.1 1 10 100 10 9 2.30 µH 8 1.65 µH 7 0.36 µH 1.10 µH 6 0.65 µH 5 4 3 2 1 0 0.1 Frequency (MHz) US +1-847-639-6400 [email protected] UK +44-1236-730595 [email protected] Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] 1 10 100 Frequency (MHz) Document 420-3 Revised 07/13/11 © Coilcraft Inc. 2013 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information.