Thru-Hole Power Inductor ELECTRONICS INC. EPIXXXXXXAC5 & EPIXXXXXXAC5-LF • Optimized for National’s LM257X Series • Low loss material ensures operation in high frequency switching converters, such as Buck, Boost or as output averaging filter inductor • Also suitable for use in high quality filter applications • Add “-LF” after part number for Lead-Free • 52 KHz Switching Frequency • Low Cost Inductor Primary Specification Part Number National Semiconductor Chip Induct. (µH ± 20%) @ 0 Adc DCR (Ω Typ.) Induct. (µH 10%) @ Idc Idc (mA) Core Loss @ Vt1 (mW) Vt1 (V-µSec) 52 KHz Temp.Rise @ Vt1 °C (Typ.) EPI221302AC5(-LF) EPI331302AC5(-LF) EPI471202AC5(-LF) EPI681132AC5(-LF) EPI102951AC5(-LF) LM257X-H220 LM257X-H330 LM257X-H470 LM257X-H680 LM257X-H1000 260 437 542 757 1093 .090 .117 .210 .247 .297 220 330 470 680 1000 3000 3000 2000 1300 950 510 280 210 150 110 230.8 230.8 230.8 230.8 230.8 23 26 20 12 9 For no header version : add “V” for Vertical Mount and add “H” for Horizonal Mount Applications 7V-40V (60V for HV) Unregulated DC Input Feedback +Vin Cin LM257X Vsw + µH D1 1N5822 Gnd Package AC5V 1.300 Max. (33.02) + Cout On/Off Package AC5 Package AC5H Pad Layout Pad Layout .060 Ø (1.52) .500 (12.70) .700 Max. (19.78) +5V Regulated Output Load LX Output .060 Ø (1.52) 1.300 Max. (33.02) .500 (12.70) 1.300 (33.02) .375 ± .125 (9.53 ± 3.18) .700 (19.78) 1.100 (27.94) 1.400 Max. (35.56) Pad Layout .375 ± .125 (9.53 ± 3.18) 1.300 Max. (33.02) .500 (12.70) .625 (15.75) .110/.150 (2.79/3.81) Notes : .500 (12.70) 1.100 (27.94) .060 Ø (1.52) EPIXXXXXXAC5 EPIXXXXXXAC5-LF 1. Lead Finish SnPb Hot Tin Dip (Sn) 2. Peak Solder Rating 225°C 260°C (for wave solder process Only) 4. Weight 5. Packaging Information (Tube) 51 grams 51 grams TBD pcs / tube TBD pcs / tube Unless Otherwise Specified Dimensions are in Inches /mm ± .010 /.25 PCA ELECTRONICS, INC. 16799 SCHOENBORN ST. NORTH HILLS, CA 91343 Product performance is limited to specified parameters. Data is subject to change without prior notice. CSIXXXXXXAC5 Rev. 4 7/27/06 FT TEL: (818) 892-0761 FAX: (818) 894-5791 http://www.pca.com