Datasheet

Application informations L7981
34/44 Doc ID 15182 Rev 3
Figure 28. Load regulation Figure 29. Line regulation
Figure 30. Load transient: from 0.4 A to 3 A Figure 31. Soft-start
Figure 32. Short-circuit behavior
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
0 0.5 1 1.5 2 2.5 3
Io [A]
Δ
V
FB
/V
FB
[%]
Vcc=5V
Vcc=12V
Vcc=24V
-0.6
-0.5
-0.4
-0.3
-0.2
-0.1
0.0
0.1
5 10152025
V
CC
[V]
Δ
V
FB
/V
FB
[%]
Io= 1A
Io= 2A
Io= 3A
V
OUT
200mV/div
AC coupled
I
L
1A/div
Time base 200us/div
V
IN
=24V
V
OUT
=3.3V
C
OUT
=47uF
L=10uH
F
SW
=520k
I
L
1A/div
V
OUT
1V/div
Time base 1ms/div
I
L
1A/div
V
OUT
0.5V/div
Time base 1ms/div
I
L
1A/div
OUT 10V/div
V
OUT
1V/div
SHORTED OUTPUT
Time base 5ms/div
I
L
1A/div
OUT 10V/div
V
OUT
1V/div
SHORTED OUTPUT
Time base 5ms/div