S-1170 Datasheet, PDF (21/29 Pages) Seiko Instruments Inc – HIGH RIPPLE-REJECTION AND LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR

HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0_02
S-1170 Series
„ Reference Data
(1) Input transient response characteristics
S-1170B15
IOUT = 100 mA, tr = tf = 5.0 µs, COUT = 4.7 µF, CIN = 4.7 µF
1.62
1.60
1.58 _VIN
1.56
1.54
1.52 _VOUT
1.50
1.48
1.46
−20 −10 0
10 20
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
30 40 50 60
t [µs]
S-1170B50
IOUT = 100 mA, tr = tf = 5.0 µs, COUT = 4.7 µF, CIN = 4.7 µF
5.12
5.10 _VIN
5.08
5.06
5.04
5.02 _VOUT
5.00
4.98
4.96
−20 −10 0
10 20
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0
30 40 50 60
t [µs]
(2) Load transient response characteristics
S-1170B15 (Ta = 25°C)
VIN = 2.5 V, COUT = 4.7 µF, CIN = 4.7 µF, IOUT = 50↔100 mA
1.70
150
IOUT
1.65
100
1.60
50
1.55 _VOUT
0
1.50
−50
1.45
−100
1.40
−150
−20 0 20 40 60 80 100 120 140 160
t [µs]
S-1170B50 (Ta = 25°C)
VIN = 6.0 V, COUT = 4.7 µF, CIN = 4.7 µF, IOUT = 50↔100 mA
5.20
150
IOUT
5.15
100
5.10
50
5.05
0
VOUT
5.00
−50
4.95
−100
4.90
−150
−20 0 20 40 60 80 100 120 140 160
S-1170B30
IOUT = 100 mA, tr = tf = 5.0 µs, COUT = 4.7 µF, CIN = 4.7 µF
3.08
6.0
3.06
5.0
VIN
3.04
4.0
3.02
3.0
3.00
2.0
VOUT
2.98
1.0
2.96
0
−20 −10 0 10 20 30 40 50 60
t [µs]
S-1170B30 (Ta = 25°C)
VIN = 4.0 V, COUT = 4.7 µF, CIN = 4.7 µF, IOUT = 50↔100 mA
3.20
150
IOUT
3.15
100
3.10
50
3.05
0
VOUT
3.00
−50
2.95
−100
2.90
−150
−20 0 20 40 60 80 100 120 140 160
t [µs]
t [µs]
Seiko Instruments Inc.
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