HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1170 Series
Rev.4.0_00
Seiko Instruments Inc.
22
Reference Data
(1) Input transient response characteristics
S-1170B15 S-1170B30
IOUT = 100 mA, tr = tf = 5.0 μs, COUT = 4.7 μF, CIN = 4.7 μF IOUT = 100 mA, tr = tf = 5.0 μs, COUT = 4.7 μF, CIN = 4.7 μF
VOUT [V]
−
20
−
10
0
10
20 30
40
50
60
1.62
1.60
1.58
1.56
1.54
1.52
1.50
1.48
1.46
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
V
IN
V
OUT
VIN [V]
VOUT [V]
−
20
−
10
0 10 20
30
40
50
60
3.08
3.06
3.04
3.02
3.00
2.98
2.96
6.0
5.0
4.0
3.0
2.0
1.0
0
V
IN
V
OUT
VIN [V]
t [μs]
t [μs]
S-1170B50
IOUT = 100 mA, tr = tf = 5.0 μs, COUT = 4.7 μF, CIN = 4.7 μF
VOUT [V]
−
20
−
10
0
10
20 30
40
50
60
5.12
5.10
5.08
5.06
5.04
5.02
5.00
4.98
4.96
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0
V
IN
V
OUT
VIN [V]
t [μs]
(2) Load transient response characteristics
S-1170B15 (Ta = 25°C) S-1170B30 (Ta = 25°C)
VIN = 2.5 V, COUT = 4.7 μF, CIN = 4.7 μF, IOUT = 50↔100 mA VIN = 4.0 V, COUT = 4.7 μF, CIN = 4.7 μF, IOUT = 50↔100 mA
VOUT [V]
1.70
1.65
1.60
1.55
1.50
1.45
1.40
150
100
50
0
−
50
−
100
−
150
0
20
40
60
80
100
120
140
−
20
160
I
OUT
V
OUT
IOUT [mA]
VOUT [V]
150
100
50
0
−
50
−
100
−
150
3.20
3.15
3.10
3.05
3.00
2.95
2.90
0 20 40 60
80
100
120
140
−
20
160
I
OUT
V
OUT
IOUT [mA]
t [μs]
t [μs]
S-1170B50 (Ta = 25°C)
VIN = 6.0 V, COUT = 4.7 μF, CIN = 4.7 μF, IOUT = 50↔100 mA
VOUT [V]
5.20
5.15
5.10
5.05
5.00
4.95
4.90
150
100
50
0
−
50
−
100
−
150
0
20
40
60
80
100
120
140
−
20
160
V
OUT
I
OUT
IOUT [mA]
t [μs]
