E L E C T R O N I C S I N C .

Thru-Hole Power Inductor

TEL: (818) 892-0761

FAX: (818) 894-5791

http://www.pca.com

PCA ELECTRONICS, INC.

16799 SCHOENBORN ST.

NORTH HILLS, CA 91343

• 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

EPIXXXXXXAC5 & EPIXXXXXXAC5-LF

Product performance is limited to specified parameters. Data is subject to change without prior notice.

Primary Specification

Unless Otherwise Specified Dimensions are in Inches /mm ± .010 /.25

CSIXXXXXXAC5

Rev. 4

7/27/06 FT

260

437

542

757

1093

Induct.

(µH ± 20%)

@ 0 Adc

DCR

(

Ω Typ.)

.090

.117

.210

.247

.297

Vt1

(V-µSec)

52 KHz

230.8

230.8

230.8

230.8

230.8

Induct.

(µH 10%)

@ Idc

220

330

470

680

1000

Part

Number

EPI221302AC5(-LF)

EPI331302AC5(-LF)

EPI471202AC5(-LF)

EPI681132AC5(-LF)

EPI102951AC5(-LF)

Idc

(mA)

3000

3000

2000

1300

950

National

Semiconductor

Chip

LM257X-H220

LM257X-H330

LM257X-H470

LM257X-H680

LM257X-H1000

@ Vt1

°C (Typ.)

23

26

20

12

9

Temp.Rise

Core Loss

510

280

210

150

110

@ Vt1

(mW)

Package AC5

Applications

+Vin

+5V

Regulated

Output

Load

LX

µH

D1

1N5822

Cin

Cout

Feedback

Output

Vsw

On/Off

Gnd

LM257X

+

+

7V-40V

(60V for HV)

Unregulated

DC Input

Package AC5V

Package AC5H

1.400

Max.

(35.56)

.110/.150

(2.79/3.81)

1.300

(33.02)

.500

(12.70)

.700

(19.78)

.500

(12.70)

Pad Layout

.060 Ø

(1.52)

.625

(15.75)

.375 ± .125

(9.53 ± 3.18)

1.300

Max.

(33.02)

Pad Layout

.500

(12.70)

.060 Ø

(1.52)

.700 Max.

(19.78)

.500

(12.70)

.375 ± .125

(9.53 ± 3.18)

1.300

Max.

(33.02)

Pad Layout

1.100

(27.94)

.060 Ø

(1.52)

1.300

Max.

(33.02)

1.100

(27.94)

For no header version : add “V” for Vertical Mount and add “H” for Horizonal Mount

Notes :

1. Lead Finish

2. Peak Solder Rating

(for wave solder process Only)

4. Weight

5. Packaging Information

(Tube)

EPIXXXXXXAC5

SnPb

225°C

51 grams

TBD pcs / tube

EPIXXXXXXAC5-LF

Hot Tin Dip (Sn)

260°C

51 grams

TBD pcs / tube