Datasheet

DocID022446 Rev 8 25/44
L7985 Application information
44
Equation 32
For example with V
OUT
= 5 V, V
IN
= 24 V, I
O
= 2 A, L = 22 µH, C
OUT
= 330 F, ESR = 70 mΩ
the type II compensation network is:
In Figure 15 the module and phase of the open-loop gain is shown. The bandwidth is about
36 kHz and the phase margin is 53 °.
Figure 15. Open-loop gain Bode diagram with electrolytic/tantalum output capacitor
C
5
C
4
2 R
4
C
4
4BW 1–
------------------------------------------------------------- -=
R
1
1.1k= R
2
150= R
4
4.99k= C
4
180nF= C
5
180pF=  