LM2596 查看數據表（PDF） - ON Semiconductor

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LM2596

3.0 A, Step-Down Switching Regulator

ON Semiconductor 

LM2596

LM2596 Series Buck Regulator Design Procedures (continued)

Table 1. RECOMMENDED VALUES OF THE OUTPUT CAPACITOR AND FEEDFORWARD CAPACITOR

(Iload = 3 A)

Nichicon PM Capacitors

Vin (V)

40

1500/35/24

1000/35/29

Capacity/Voltage Range/ESR (mF/V/mW)

1000/35/29 680/35/36 560/25/55 560/25/55

470/35/46

26

1200/35/26

820/35

680/35/36 560/35/41 470/25/65 470/25/65 330/35/60

22

1000/35/29 680/35/36 560/35/41 330/25/85 330/25/85 220/35/85

20

820/35/32 470/35/46 470/25/65 330/25/85 330/25/85 220/35/85

18

820/35/32 470/35/46 470/25/65 330/25/85 330/25/85 220/35/85

12

820/35/32 470/35/46 220/35/85 220/25/111

10

820/35/32 470/35/46 220/35/85

Vout (V)

2

4

6

CFF (nF]

40

15

5

9

12

15

24

2

1.5

1

0.6

470/35/46

28

0.6

70

60

L27

L35

50

220uH

L36

L27

40

150uH

L29

30

25

100uH

L30

68uH

L42

L37

L38

L43

L44

L39

20

L31

L40

L21

15

L22

10

9

L23

8

7

6

5

L15

47uH

L32

L40

33uH

L40

22uH

L34

L24

L25

15uH

4

0.6

0.8

1.0

1.5

2.0

2.5 3.0

Maximum load current (A)

Figure 18. Inductor Value Selection Guides (For Continuous Mode Operation)

http://onsemi.com

11

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