HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1111/1121 Series
Rev.4.1_00
Reference Data
(1) Input transient response characteristics
IOUT = 30 mA, tr = tf = 5.0 μs, COUT = 2.2 μF, CIN = 0 μF
3.025
IOUT = 30 mA, tr = tf = 5.0 μs, COUT = 4.7 μF, CIN = 0 μF
6
5
3.025
6
5
3.02
3.02
3.015
4
3
2
1
0
3.015
4
3
2
1
0
VIN
V
IN
3.01
3.01
3.005
3
VOUT
V
OUT
3.005
3
2.995
2.995
-20
0
20 40
60
80 100 120 140 160 180
-20
0
20 40 60 80 100 120 140 160 180
t [μs]
t [μs]
(2) Load transient response characteristics
VIN = 4.0 V, COUT = 2.2 μF, CIN = 1.0 μF,
IOUT = 50↔100 mA
VIN = 4.0 V, COUT = 4.7 μF, CIN = 1.0 μF,
IOUT = 50↔100 mA
3.2
150
100
3.2
150
3.15
3.15
100
50
3.1
50
0
3.1
3.05
3.05
3
IOUT
0
IOUT
3
-50
-50
-100
-150
2.95
VOUT
2.9
-100
2.95
2.9
VOUT
-150
-2
0
2
4
6
8
10 12 14 16 18
-2
0
2
4
6
8
10 12 14 16 18
t [μs]
t [μs]
(3) Shutdown pin transient response characteristics
S-1111B15 (Ta = 25 °C)
VIN = 2.5 V, COUT = 2.2 μF, CIN = 1.0 μF
S-1111B30 (Ta = 25 °C)
VIN = 4.0 V, COUT = 2.2 μF, CIN = 1.0 μF
5
6
4
2.5
3
2
4
2
VON/OFF
VON/OFF
3
2
0
1.5
1
1
0
2
VOUT
VOUT
1
0
-2
-4
-6
0.5
0
-1
-2
-3
-1
-0.5
-10
0
10 20 30 40 50 60 70 80 90
-10
0
10 20 30 40 50 60 70 80 90
t [μs]
t [μs]
S-1111B50 (Ta = 25 °C)
VIN = 6.0 V, COUT = 2.2 μF, CIN = 1.0 μF
7
6
8
6
4
2
0
VON/OFF
5
4
3
VOUT
2
-2
1
-4
-6
-8
0
-1
-10
0
10 20 30 40 50 60 70 80 90
t [μs]
21
Seiko Instruments Inc.
SII [ SEIKO INSTRUMENTS INC ]
