Document 684-1 Shielded Power Inductor For NSC LM315x SIMPLE SWITCHER® • Designed specifically for National Semiconductor LM315x SIMPLE SWITCHER® Controllers for applications with output current up to 12 A. • L1 on NSC Demonstration Board LM3152-3.3 • Soft saturation makes it ideal for use in multi-phase VRM/VRD regulators and high current/high frequency DC/DC converters. • Flat wire construction for low DCR • The materials used eliminate all thermal aging issues Part number1 HA3778-AL_ Inductance2 DCR ±8% ±20% (µH) (mOhm) 1.65 2.53 SRF typ3 Isat4 Irms5 (MHz) (A) (A) 55 17 20 Core material Powdered iron Terminations RoHS compliant tin-silver over copper. Other terminations available at additional cost. Weight 3.44 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) Mean Time Between Failures (MTBF) 26,315,789 hours Packaging 100/7″ reel; 500/13″ reel Plastic tape: 24 mm wide, 0.4 mm thick, 16 mm pocket spacing, 7.5 mm pocket depth PCB washing Only pure water or alcohol recommended 0.448 typ 11,37 0.453 max 11,50 CCIxxxx HA3778-ALC 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 (100 parts per full reel). 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 (500 parts per full reel). 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) 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. HA3778-AL 1. When ordering, please specify termination and packaging codes: 0.369 typ 9,38 0.384 max 9,75 0.262 typ 6,65 0.280 max 7,10 Start Finish 0.223 ±0.012 5,67 ±0,30 0.336 ±0.010 8,53 ±0,25 Dimensions are in inches mm Specifications subject to change without notice. Please check our website for latest information. © Coilcraft, Inc. 2008 Recommended Land Pattern 0.069 ±0.002 1,75 ±0,05 0.375 9,53 0.100 2,54 Document 684-1 0.211 5,37 Revised 10/16/08 Document 684-2 Shielded Power Inductor – HA3778-AL Inductance vs Frequency 3.0 3.0 2.5 2.5 Inductance (µH) Inductance (µH) Inductance vs Current 2.0 1.5 1.65 µH 1.0 2.0 1.5 1.65 µH 1.0 0.5 0.5 0 0 0.1 10 1 100 0.1 Current Derating 120 110 70 100 1.65 µH 50 40 30 20 10 90 80 70 60 50 40 30 20 Isat Irms 10 0 0 5 10 15 20 Current (A rms) 25 30 35 25°C Percent of rated current Temperature rise (from 25°C) 80 0 -40 -20 0 20 40 60 80 100 120 140 Ambient temperature (°C) Specifications subject to change without notice. Please check our website for latest information. © Coilcraft, Inc. 2008 100 Frequency (MHz) Temperature Rise vs Current 60 10 1 Current (A) Document 684-2 Revised 10/16/08