Recommended Component Parameters in Typical Applications

Table 5 lists the recommended inductance (L

voltages. The inductance is determined by assuming that the ripple current is 35% of load current I

parameters are calculated by assuming a 47mF low ESR ceramic output capacitor and a loop gain crossover frequency

of F

Table 5. Recommended inductance (L

Vin(V)

Vo(V)

Io(A)

Fsw(kHz)

C2(uF)

L1(uH)

R7(k)

C5(nF)

C8(pF)

1.5

500

3.3

10

2.2

500

4.7

16.2

2.2

1000

2.2

29.4

0.47

500

6.8

23.2

2.2

1000

3.3

39.2

0.47

500

6.8

29.4

2.2

1000

3.3

69.8

0.47

500

6.8

43.2

2.2

1000

3.3

90.9

0.47

500

3.3

69.8

2.2

1000

2.2

133

0.47

1.5

300

6.8

6.81

2.2

500

6.8

12.4

2.2

1000

2.2

29.4

0.47

500

6.8

23.2

2.2

1000

3.3

43.2

0.47

500

8.2

29.4

2.2

1000

4.7

59

0.47

500

10

49.9

2.2

1000

4.7

100

0.47

500

15

59

2.2

1000

6.8

133

0.47

10

10

2.5

3.3

5

7.5

10

2.5

3.3

5

Typical Applications

Recommended Parameters

12

24

3

3

47

47

7.5

10

SC4525A

6