LM2585S-5.0 National Semiconductor, LM2585S-5.0 Datasheet - Page 14

• Manufacturer Part Number: LM2585S-5.0
• Description: DC/DC Converter IC
• Manufacturer: National Semiconductor

Specifications of LM2585S-5.0

• Input Voltage: 40V
• Output Voltage: 5V
• No. Of Pins: 5
• Termination Type: SMD
• Mounting Type: Through Hole
• Output Current Max: 0.5A
• Peak Reflow Compatible (260 C): No
• Supply Voltage Max: 40V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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Typical Flyback Regulator Applications
Transformer Selection (T)
Figure 13 lists the standard transformers available for flyback regulator applications. Included in the table are the turns ratio(s) for
each transformer, as well as the output voltages, input voltage ranges, and the maximum load currents for each circuit.
Note 15: Coilcraft Inc.
1102 Silver Lake Road, Cary, IL 60013: Fax: [phone]
Note 16: Pulse Engineering Inc. Phone: [phone]
12220 World Trade Drive, San Diego, CA 92128: Fax: [phone]
Note 17: Renco Electronics Inc. Phone: [phone]
60 Jeffryn Blvd. East, Deer Park, NY 11729: Fax: [phone]
Note 18: Schott Corp. Phone: [phone]
1000 Parkers Lane Road, Wayzata, MN 55391: Fax: [phone]
Applications
Transformers
V
V
I
N
V
I
N
V
I
N
OUT1
OUT2
OUT3
IN
OUT1
1
OUT2
2
OUT3
3
former
Trans-
Type
T5
T6
T7
(Max)
(Max)
(Max)
(Note 15)
Coilcraft
Q4338-B
Q4339-B
S6000-A
Phone: [phone]
Figure 7
4V–6V
3.3V
1.4A
T7
1
Surface Mount
(Note 15)
Coilcraft
Q4437-B
Q4438-B
FIGURE 14. Transformer Manufacturer Guide
S6057-A
FIGURE 13. Transformer Selection Table
Figure 8
4V–6V
5V
1A
T7
1
Manufacturers’ Part Numbers
Surface Mount
Figure 9
8V–16V
PE-68413
PE-68414
(Note 16)
0.8A
12V
14
T7
1
Pulse
—
(Continued)
Figure 10
4V–6V
0.15A
0.15A
−12V
12V
1.2
1.2
T6
PE-68482
(Note 16)
Pulse
—
—
Figure 11
18V–36V
−12V
0.6A
0.6A
12V
(Note 17)
1.2
1.2
T6
RL-5532
RL-5533
RL-5751
Renco
Figure 12
18V–36V
67140890
67140900
(Note 18)
0.25A
0.25A
−12V
Schott
1.8A
1.15
1.15
26606
12V
0.5
T5
5V