DocID8827 Rev 3

21/30

AN1517

Application information

30

In Figure 14 and Figure 15, for example, it can be observed that when the input voltage

increases for a given component list, the current peak increases also. The current limit is

5.5

Application circuit

Figure 16 shows the demonstration board application circuit for the device in the SMD

Figure 16. Demonstration board application circuit

I

L

Vout

I

LIMIT

I

L

Vout

I

LIMIT

8

2

4

5

1

7

L5972D

C1

10

μF

25V

CERAMIC

C2

100

μF

10V

VOUT=3.3V

VIN = 4.4V to 25V

R1

5.6K

R2

3.3K

R3

4.7K

C4

22nF

C3

220pF

3

L1 33

μH

6

D1

STPS2L25U

COMP

VCC

OUT

FB

GND

AM00027v1

L5972D