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LM2678S-12 Datasheet(PDF) 18 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part # LM2678S-12
Description  SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2678S-12 Datasheet(HTML) 18 Page - National Semiconductor (TI)

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Application Hints (Continued)
TABLE 4. Input Capacitors for Fixed Output Voltage Application
(Assumes worst case maximum input voltage and load current for a given inductance value)
Output
Voltage
(V)
Inductance
(µH)
Surface Mount
AVX TPS Series
Sprague 594D
Series
Kemet T495 Series
No.
C Code
No.
C Code
No.
C Code
3.3
10
3C72
C10
3C9
15
**
3
C13
4
C12
22
**
2
C13
3
C12
33
**
2
C13
3
C12
5
10
3C42C63C9
15
4
C9
3
C12
4
C10
22
**
3
C13
4
C12
33
**
2
C13
3
C12
47
**
1
C13
2
C12
12
10
4
C9
2
C10
4
C10
15
4
C8
2
C10
4
C10
22
4
C9
3
C12
4
C10
33
**
3
C13
4
C12
47
**
2
C13
3
C12
68
**
2
C13
2
C12
100
**
1
C13
2
C12
Output
Voltage
(V)
Inductance
(µH)
Through Hole
Sanyo OS-CON SA
Series
Sanyo MV-GX
Series
Nichicon PL Series
Panasonic HFQ
Series
No.
C Code
No.
C Code
No.
C Code
No.
C Code
3.3
10
2
C9
2
C8
1
C18
1
C8
15
**
2
C13
1
C25
1
C16
22
**
1
C14
1
C24
1
C16
33
**
1
C14
1
C24
1
C16
5
10
2
C7
2
C8
1
C25
1
C8
15
**
2C81
C25
1C8
22
**
2
C13
1
C25
1
C16
33
**
1
C14
1
C23
1
C13
47
**
1
C12
1
C19
1
C11
12
10
2
C10
2
C8
1
C18
1
C8
15
2
C10
2
C8
1
C18
1
C8
22
**
2C81
C18
1C8
33
**
2
C12
1
C24
1
C14
47
**
1
C14
1
C23
1
C13
68
**
1
C13
1
C21
1
C15
100
**
1
C11
1
C22
1
C11
* Check voltage rating of capacitors to be greater than application input voltage.
No. represents the number of identical capacitor types to be connected in parallel
C Code indicates the Capacitor Reference number in Table 2 for identifying the specific component from the manufacturer.
www.national.com
18


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