Datasheet

Application informations L7981
26/44 Doc ID 15182 Rev 3
Equation 28
For example with V
OUT
=5 V, V
IN
=24 V, I
O
=3 A, L=18 μH, C
OUT
=330 μF, ESR=35 mΩ, the
type II compensation network is:
In Figure 15 is shown the module and phase of the open loop gain. The bandwidth is about
21 kHz and the phase margin is 45°.
C
5
C
4
2π R
4
C
4
4BW⋅ 1–⋅⋅⋅
------------------------------------------------------------- -=
R
1
1.1kΩ= R
2
150Ω= R
4
4.99kΩ= C
4
82nF= C
5
68pF=,, ,,