LM2674N-3.3 National Semiconductor, LM2674N-3.3 Datasheet - Page 14

• Manufacturer Part Number: LM2674N-3.3
• Description: DC/DC Converter IC
• Manufacturer: National Semiconductor

Specifications of LM2674N-3.3

• Input Voltage: 40V
• Output Current: 500mA
• Output Voltage: 3.3V
• No. Of Pins: 8
• Mounting Type: Through Hole
• Voltage Regulator Type: Switching
• Output Current Max: 500mA
• Peak Reflow Compatible (260 C): No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

www.national.com
LM2674 Series Buck Regulator Design Procedure (Fixed Output)
20V
30V
40V
50V
International Rectifier
Corp.
Motorola, Inc.
General Instruments
Corp.
Diodes, Inc.
V
R
MBRS130
MBRS140
10MQ040
15MQ040
10BQ040
10BQ050
Surface
Mount
SK12
B120
SK13
B130
SK14
B140
SK15
B150
500mA Diodes
FIGURE 14. RMS Current Ratings for Low ESR Electrolytic Capacitors (Typical)
Through
MBR150
11DQ03
11DQ04
11DQ05
1N5817
1N5818
1N5819
SR102
SR103
SR104
SR105
Hole
Phone
FAX
Phone
FAX
Phone
FAX
Phone
FAX
MBRD340
30WQ03F
30WQ04F
MBRS340
30WQ05F
30BQ040
Surface
Mount
FIGURE 13. Diode Manufacturers’ Phone Numbers
SK32
SK33
SK34
SK35
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
FIGURE 12. Schottky Diode Selection Table
3A Diodes
Through
MBR340
MBR350
31DQ03
31DQ04
31DQ05
1N5820
1N5821
1N5822
SR302
SR304
SR305
Hole
14
DS100041-30
(Continued)