Datasheet

Typical performance characteristics LD39050xx
14/24
Figure 28. Load transient Figure 29. Line transient
V
EN
= V
IN
= 3.5 V, I
OUT
from 100 mA to 0.5 A, V
OUT
= 2.5 V,
C
IN
= C
OUT
= 1 µF
V
EN
= V
IN
from 4.3 V to 4.8 V, I
OUT
= 10 mA, C
OUT
= 1 µF,
C
IN
= NO
Figure 30. Startup transient Figure 31. Enable transient
V
EN
= V
IN
= from 0 V to 5.5 V, I
OUT
=10 mA, C
IN
= C
OUT
= 1
µF, V
OUT
= 2.5 V
V
EN
from 0 V to 2 V, V
IN
= 3.5 V, V
OUT
= 2.5 V, I
OUT
= 10
mA, C
IN
= C
OUT
= 1µF
I
OUT
V
OUT
I
OUT
V
OUT
V
IN
V
OUT
V
IN
V
OUT
V
IN
V
OUT
V
IN
V
OUT
V
EN
V
OUT
V
EN
V
OUT
Figure 32. ESR required for stability with
ceramic capacitors
Figure 33. ESR required for stability with
ceramic capacitors
V
IN
= V
EN
= from 1.8 V to 5.5 V, I
OUT
= from 1 mA to 500
mA, V
OUT
= 0.8 V, C
IN
= 1 µF
V
IN
= V
EN
= from 3.5 V to 5.5 V, I
OUT
= from 1 mA to 500
mA, V
OUT
= 2.5 V, C
IN
= 1 µF
0
0.25
0.5
0.75
1
1.25
1.5
12345678910111213141516171819202122
C
OUT
[µF] (nominal value)
ESR @ 100 kHz [Ω]
UNSTABLE ZONE
STABLE ZONE
0
0.25
0.5
0.75
1
1.25
1.5
12345678910111213141516171819202122
C
OUT
[µF] (nominal value)
ESR @ 100 kHz [Ω]
UNSTABLE ZONE
STABLE ZONE
0
0.25
0.5
0.75
1
1.25
1.5
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
C
OUT
[µF] (nominal value)
ESR @ 100 kHz [Ω]
STABLE ZONE
UNSTABLE ZONE
0
0.25
0.5
0.75
1
1.25
1.5
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
C
OUT
[µF] (nominal value)
ESR @ 100 kHz [Ω]
STABLE ZONE
UNSTABLE ZONE