Nordtek
 

SW - Inductors for 50KHz Simple Switcher

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Compatible with National Semiconductor´s Simple Switcher TM Part Numbers LM2574, LM2475 and LM2576    
   

Features

  • High energy storage with minimum saturation
  • High stability from no load to full load
  • Available in both SMD and TH versions
  • Manufactured in ISO-9001 approved facility
  • Operating temperature range: -40°C to +125°
  


Mechanical Layout
Cross Reference

Electrical Specifications at 25°C

Part Number Rated Current (IDC) LN (µH)
Typical *		 LO (µH) ±20% No DC Load ETOP (V-µSec) Max. DCR (Ohms) Max. Package
"C" "S" "T" "B" "F" "V"
 SW_-3.0-47 3,0 47 38 90 0,05 2 5 5      
 SWC-3.0-68 3,0 68 55 90 0,02 4          
 SWC-3.0-100 3,0 100 91 90 0,04 4          
 SW_-2.0-150 2,0 150 130 90 0,10 4 6        
 SW_-1.4-220
 SW_-1.4-220		 1,4
1,4		 220
220		 230
176		 90
90		 0,38
0,14
3		 5
6		 5
   2
 2
 SW_-0.9-330
 SW_-0.9-330		 0,9
0,9		 330
330		 302
267		 90
90		 0,74
0,18
3		 5
6		 5
   2
 2
 SWC-0.64-470 0,64 470 426 90 0,16 4          
 SW_-0.85-680 0,85 680 657 90 1,25   5 5   2 2 
 
 SWC-3.0-150 3,0 150 136 200 0,10 4          
 SWC-3.0-220 3,0 220 167 200 0,07 5          
 SWC-3.0-330 3,0 330 292 200 0,15 5          
 SWC-2.0-470 2,0 470 369 200 0,17 5          
 SWC-1.3-680 1,3 680 562 200 0,20 5          
 SWC-0.95-1000 0,95 1.000 762 200 0,24 5          
 SWB-0.62-1500 0.62 1.500 1.150 200 1,00       8    
 SWB-0.42-2200 0,42 2.200 1.730 200 1,80       8    

Notes:
1) Inductance will be typical for the IDC and ETOP values listed above

2) No load Inductance measured at BOP maximum of 10 gauss (10mV @ 20kHz)

3) Simple Switcher TM is a trademark of National Semiconductor Corporation		  




Mechanical Layout

Mechanical Layout


Mounting Style Size Code
 Dimensions - Inches (mm)
A B C D E
"S"
SMD		 S5 0.669
(17.0)		 0.701
(17.8)		 0.425
(10.8)		 0.591
(15.0)		 0.591
(15.0)
S6 0.925
(23.5)		 0.925
(23.5)		 0.531
(13.5)		 0.827
(21.0)		 0.689
(17.5)
 
Mounting Style Size Code
 Dimensions - Inches (mm)
C D E X=Coil
O.D. +
"C"
Vertical
Clip
Mount		 C2 0.650
(16.5)		 0.449
(11.4)		 0.299
(7.60)		 0.110
(2.80)
C3 0.827
(21.0)		 0.449
(11.4)		 0.299
(7.60)		 0.110
(2.80)
C4 0.949
(24.1)		 0.598
(15.2)		 0.449
(11.4)		 0.110
(2.80)
C5 1.252
(31.8)		 0.701
(17.8)		 0.500
(12.7)		 0.130
(3.30)




SW Series Cross Reference for National´s 50kHz Simple SwitcherTM Pulse Eng. - Talema

Pulse Engineering
Part Number		 Talema Part Number *
Vertical
Clip Mount		 Flat Open
SMD		 Flat Open
TH		 Vertical TH
Base Mount		 Flat TH
Encapsulated		 Vertical TH
Encapsulated
 PE-53112
 PE-92114K		  SWC-3.0-47
 SWC-3.0-68		  SWS-3.0-47

  SWT-3.0-47

      
 PE-92108K
 PE-53113		  SWC-3.0-100
 SWC-2.0-150		  SWS-2.0-150
        
 PE-52626
 PE-53145
 SWC-1.4-220		  SWS-1.4-220
 SWS6-1.4-220		  SWT-1.4-220

    SWF-1.4-220

  SWV -1.4-220
 PE-52627
 PE-53146		  
 SWC-0.90-330		  SWS-0.90-330
 SWS6-0.90-330		  SWT-0.90-330

    SWF-0.90-330

  SWV-0.90-330
 PE-53114
 PE-52629		  SWC-0.64-470
 SWS-0.85-680
 SWT-0.85-680		  
 SWF-0.85-680
 SWV-0.85-680
 PE-53115
 PE-53116		  SWC-3.0-150
 SWC-3.0-220		          
 PE-53117
 PE-53118		  SWC-3.0-330
 SWC-2.0-470		          
 PE-53119
 PE-53120		  SWC-1.3-680
 SWC-0.95-1000		          
 PE-53121
 PE-53122		        SWB-0.62-1500
 SWB-0.42-2200		    


**Note: There are no equivalent Pulse SMD types for Talema PIN SWT-3.0-47 and the SWS style SMD package.