S-1172 Datasheet, PDF (23/34 Pages) Seiko Instruments Inc – HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR

Rev.1.1_00
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1172 Series
S-1172B50
V_IN = 5.5 V, C_OUT = 4.7 µF, C_IN = 4.7 µF, I_OUT = 50 ↔ 100 mA
5.20
150
5.15
100
IOUT
5.10
50
5.05
0
VOUT
5.00
−50
4.95
−100
4.90
−150
−200 0 200 400 600 800 1000 1200
t [µs]
V_IN = 5.5 V, C_OUT = 4.7 µF, C_IN = 4.7 µF, I_OUT = 100 ↔ 500 mA
5.70
600
5.50
400
IOUT
5.30
200
5.10 _VOUT
4.90
4.70
4.50
−200 0
0
−200
−400
−600
200 400 600 800 1000 1200
t [µs]
(3) Transient Response Characteristics of ON/OFF Pin (Ta = 25°C)
S-1172B10
V_IN = 2.0 V, C_OUT = 4.7 µF, C_IN = 4.7 µF, I_OUT = 100 mA
5
3
4
2
3 VON/OFF
1
2
0
1
−1
VOUT
0
−2
−1
−500
−3
0 500 1000 1500 2000
t [µs]
S-1172B30
V_IN = 4.0 V, C_OUT = 4.7 µF, C_IN = 4.7 µF, I_OUT = 100 mA
10
6
8
4
6 VON/OFF
2
4
0
2
−2
VOUT
0
−4
−2
−500
−6
0 500 1000 1500 2000
t [µs]
S-1172B50
V_IN = 5.5 V, C_OUT = 4.7 µF, C_IN = 4.7 µF, I_OUT = 100 mA
20
9
16
6
12 VON/OFF
3
8
0
4
−3
VOUT
0
−6
−4
−500
−9
0 500 1000 1500 2000
t [µs]
Seiko Instruments Inc.
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