S1131 Datasheet, PDF (20/30 Pages) Seiko Instruments Inc – HIGH RIPPLE-REJECTION AND LOW DROPOUT

HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1131 Series
Rev.4.1_00
„ Reference Data
(1) Input transient response characteristics
IOUT = 80 mA, t_r = t_f = 5.0 μs, COUT = 2.2 μF, CIN = 0 μF
3.02
6
3.015
5
3.01
3.005
3
2.995
4
VIN
3
VOUT
2
1
2.99
0
-20 0 20 40 60 80 100 120 140 160 180
t [μs]
(2) Load transient response characteristics
VIN = 4.0 V, COUT = 2.2 μF, CIN = 1.0 μF,
IOUT = 50 mA↔100 mA
3.2
150
3.15
100
3.1
3.05
50
IOUT
0
3
2.95
VOUT
-50
-100
2.9
-150
-2 0 2 4 6 8 10 12 14 16 18
t [μs]
(3) ON/OFF pin transient response characteristics
S-1131B15 (Ta = 25°C)
VIN = 2.5 V, COUT = 2.2 μF, CIN = 1.0 μF
2.5
3
2
VON/OFF
2
1.5
1
1
VOUT
0
0.5
-1
0
-2
-0.5
-3
-10 0 10 20 30 40 50 60 70 80 90
t [μs]
S-1131B50 (Ta = 25°C)
VIN = 6.0 V, COUT = 2.2 μF, CIN = 1.0 μF
7
6
5
4
3
2
1
0
-1
-10 0
V _ON/OFF
10 20 30
8
6
4
2
V _OUT
0
-2
-4
-6
-8
40 50 60 70 80 90
t [μs]
IOUT = 80 mA, t_r = t_f = 5.0 μs, COUT = 4.7 μF, CIN = 0 μF
3.02
6
3.015
5
3.01
3.005
3
4
V _IN
3
V _OUT
2
2.995
1
2.99
0
-20 0 20 40 60 80 100 120 140 160 180
t [μs]
VIN = 4.0 V, COUT = 4.7 μF, CIN = 1.0 μF,
IOUT = 50 mA↔100 mA
3.2
150
3.15
100
3.1
3.05
50
IOUT
0
3
2.95
VOUT
-50
-100
2.9
-150
-2 0 2 4 6 8 10 12 14 16 18
t [μs]
S-1131B30 (Ta = 25°C)
VIN = 4.0 V, COUT = 2.2 μF, CIN = 1.0 μF
5
6
4
4
3
2
2
VON/OFF
0
VOUT
1
-2
0
-4
-1
-6
-10 0 10 20 30 40 50 60 70 80 90
t [μs]
20
Seiko Instruments Inc.