Datasheet

Application information L7985
26/43 Doc ID 022446 Rev 3
Equation 31
For example with V
OUT
=5 V, V
IN
=24 V, I
O
=2 A, L=22 μH, C
OUT
=330 μF, 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
2π R
4
C
4
4BW⋅ 1–⋅⋅⋅
-------------------------------------------------------------------------=
R
1
1.1kΩ= R
2
150Ω= R
4
4.99kΩ= C
4
180nF= C
5
180pF=,, , ,