S-1111 Datasheet, PDF (21/25 Pages) Seiko Instruments Inc – HIGH RIPPLE-REJECTION LOW DROPOUT

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