S-814 SII [Seiko Instruments Inc], S-814 Datasheet - Page 22

• Manufacturer Part Number: S-814
• Description: LOW DROPOUT CMOS VOLTAGE REGULATOR
• Manufacturer: SII [Seiko Instruments Inc]

22
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-814 Series
1-3. At power fluctuation
Output voltage (V
Load dependencies of overshoot
V
Load dependencies of undershoot
DD
dependencies of overshoot
0.8
0.6
0.4
0.2
10 V
1.E − 05 1.E − 04 1.E − 03 1.E − 02 1.E − 01 1.E + 00
0
2.0
1.5
1.0
0.5
4 V
3 V
V
0.8
0.6
0.4
0.2
0
IN
1.E−05 1.E−04 1.E−03 1.E−02 1.E−01 1.E+00
0
0
=V
V
V
V
V
IN
IN
OUT
OUT(S)
IN
=V
=V
V
OUT
3 V
OUT(S)
OUT
OUT(S)
+1 V→V
2
=2 V
V
) – Time (t)
OUT
+2 V→V
+ 1 V → V
C
=2 V
L
=1 μF
3 V
I
t [50 μs/div]
4
I
DD
OUT
OUT
V
V
5 V
C
, I
IN
DD
3 V
OUT(S)
L
=4.0→10 V, I
OUT
[A]
[A]
=4.7 μF
OUT(S)
[V]
=30 mA, C
6
+1 V, C
+ 2 V, C
V
OUT
L
OUT
8
=1 μF
=2 V
L
Seiko Instruments Inc.
5 V
=1 μF
L
5 V
=1 μF
=30 mA
10
C
Temperature dependencies of overshoot
C
L
L
dependencies of overshoot
dependencies of undershoot
V
IN
10 V
=V
1.4
1.2
1.0
0.8
0.6
0.4
0.2
3 V
4 V
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.6
1.0
0.8
0.4
0.2
OUT(S)
V
V
0
0
0.1
0.1
0
IN
−50
IN
V
=V
=V
V
V
OUT
IN
V
+1 V→V
OUT
OUT(S)
OUT(S)
OUT
=2 V
5 V
=2 V
+1 V→V
+2 V→V
V
OUT
OUT(S)
5 V
1
1
=2 V
0
t [50 μs/div]
+2 V, I
V
3 V
C
C
Ta [°C]
OUT(S)
OUT(S)
C
IN
L
L
3 V
L
=10→4.0 V, I
3 V
[μF]
=1 μF
[μF]
+2 V, I
OUT
+1 V, I
5 V
C
L
=30 mA, C
10
10
50
=4.7 μF
OUT
OUT
OUT
=30 mA
=30 mA
Rev.2.1
=30 mA
L
=1 μF
100
100
100
_00