LM2678S-3.3/NOPB National Semiconductor, LM2678S-3.3/NOPB Datasheet - Page 19

• Manufacturer Part Number: LM2678S-3.3/NOPB
• Description: IC REG SW 3.3V 5A STP DN TO263-7
• Manufacturer: National Semiconductor
• Series: SIMPLE SWITCHER®r
• Type: Step-Down (Buck)r

Specifications of LM2678S-3.3/NOPB

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 3.3V
• Current - Output: 5A
• Frequency - Switching: 260kHz
• Voltage - Input: 8 ~ 40 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: D²Pak, TO-263 (7 leads + tab)
• Current, Input Bias: 85 nA
• Current, Output: 5 A
• Current, Supply: 4.2 mA
• Frequency, Oscillator: 260 kHz
• Package Type: TO-263
• Regulator Type: Buck (Step-Down)
• Resistance, Thermal, Junction To Case: 2 °C/W
• Temperature, Operating, Range: -40 to +125 °C
• Voltage, Input: 8 to 40 V
• Voltage, Output: 3.3 V
• Primary Input Voltage: 12V
• No. Of Outputs: 1
• Output Voltage: 3.3V
• Output Current: 5A
• No. Of Pins: 7
• Operating Temperature Range: -40°C To +125°C
• Msl: MSL 3 - 168 Hours
• Current Rating: 5A
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device
• Other names: *LM2678S-3.3; LM2678S-3.3

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.
Voltage (V)
Output
3.3
12
5
Voltage (V)
Inductance
Output
3.3
12
5
(µH)
100
10
15
22
33
10
15
22
33
47
10
15
22
33
47
68
TABLE 3. Output Capacitors for Fixed Output Voltage Application
Inductance
Sanyo OS-CON SA
(µH)
100
10
15
22
33
10
15
22
33
47
10
15
22
33
47
68
No.
2
2
1
1
2
1
1
1
1
2
1
1
1
1
1
1
Series
C Code
AVX TPS Series
No.
C5
C5
C5
C5
C4
C5
C5
C4
C4
C7
C8
C7
C7
C7
C6
C6
5
4
3
1
4
3
3
2
2
4
3
2
2
2
1
1
Sanyo MV-GX Series
C Code
No.
C1
C1
C2
C1
C2
C3
C2
C2
C2
C5
C5
C5
C5
C4
C5
C4
2
2
1
1
2
1
1
1
1
1
1
1
1
1
1
1
19
Sprague 594D Series
C Code
C10
C10
C10
C10
Surface Mount
No.
C6
C5
C5
C9
C5
C4
C6
C5
C4
C3
C2
C2
Through Hole
5
4
2
2
4
2
2
2
1
3
2
2
1
1
1
1
Nichicon PL Series
C Code
No.
C1
C1
C7
C7
C6
C7
C7
C3
C7
C6
C7
C6
C7
C6
C5
C5
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Kemet T495 Series
C Code
C14
C17
C13
C12
C11
C10
No.
C8
C7
C5
C5
C6
C5
C5
C4
C2
C9
5
4
3
3
4
3
3
2
2
5
4
3
3
2
2
1
C Code
Panasonic HFQ
No.
C2
C3
C4
C4
C4
C5
C4
C4
C4
C9
C9
C8
C8
C8
C7
C8
2
2
1
1
2
1
1
1
2
2
1
1
1
1
1
1
Series
C Code
www.national.com
C6
C5
C7
C7
C5
C7
C5
C4
C4
C4
C5
C5
C4
C3
C3
C1