Datasheet

L5980 Application information
Doc ID 13003 Rev 6 25/42
Equation 25
For example with V
OUT
= 1.2 V, V
IN
= 12 V, I
O
= 0.7 A, L = 22 μH, C
OUT
= 220 μF,
ESR = 50 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
35 kHz and the phase margin is 49°.
C
5
C
4
2π R
4
C
4
4BW⋅ 1–⋅⋅⋅
------------------------------------------------------------- -=
R
1
1.1kΩ= R
2
249Ω= R
4
12kΩ= C
4
47nF= C
5
68pF=,,,,