© 2011 Semtech Corp.

www.semtech.com

SC4525D

16

Recommended Component Parameters in Typical Applications

Table 4 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 4. Recommended inductance (L

Table 4: SC4525D Compensator Parameters

Vin(V)

Vo(V)

Io(A)

C2(uF)

L1(uH)

R7(k)

C5(nF)

C8(pF)

R7

1.0

3.3

3.74

6.8

7.15

2.0

2.2

6.49

3.3

12.4

1.5

3.3

3.74

6.8

7.15

2.5

4.7

6.49

4.7

12.4

3.3

4.7

7.5

3.3

68

14.3

1.5

4.7

3.74

6.8

7.15

2.5

6.8

6.98

4.7

13.3

3.3

8.2

8.66

3.3

68

16.5

5

10

11.5

2.2

22.1

7.5

10

18.2

2.2

34.8

82

47

Typical Applications

Recommended Parameters

47

47

3.3

5

12

3