S-1172 Datasheet, PDF (22/34 Pages) Seiko Instruments Inc – HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR

HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1172 Series
Rev.1.1_00
„ Reference Data
(1) Characteristics of Input Transient Response (Ta = 25°C)
S-1172B10
I_OUT = 100 mA, tr = tf = 5.0 µs, C_OUT = 4.7 µF, C_IN = 4.7 µF
1.15
4
VIN
1.10
3
1.05
2
VOUT
1.00
1
0.95
0
−200 0 200 400 600 800 1000 1200
t [µs]
S-1172B30
I_OUT = 100 mA, tr = tf = 5.0 µs, C_OUT = 4.7 µF, C_IN = 4.7 µF
3.20
6
3.15
5
VIN
3.10
4
3.05 _VOUT
3
3.00
2
2.95
1
2.90
0
−200 0 200 400 600 800 1000 1200
t [µs]
S-1172B50
I_OUT = 100 mA, tr = tf = 5.0 µs, C_OUT = 4.7 µF, C_IN = 4.7 µF
5.25
7
5.20 VIN
6
5.15
5
5.10
4
5.05
3
5.00 ^VOUT
2
4.95
1
4.90
0
−200 0 200 400 600 800 1000 1200
t [µs]
(2) Characteristics of Load Transient Response (Ta = 25°C)
S-1172B10
V_IN = 2.0 V, C_OUT = 4.7 µF, C_IN = 4.7 µF, I_OUT = 50 ↔ 100 mA
1.20
150
1.15
100
IOUT
1.10
50
1.05
0
VOUT
1.00
−50
0.95
−100
0.90
−150
−200 0 200 400 600 800 1000 1200
t [µs]
V_IN = 2.0 V, C_OUT = 4.7 µF, C_IN = 4.7 µF, I_OUT = 100 ↔ 500 mA
1.40
600
1.30
400
IOUT
1.20
200
1.10
1.00
0.90
VOUT
0
−200
−400
0.80
−600
−200 0 200 400 600 800 1000 1200
t [µs]
S-1172B30
V_IN = 4.0 V, C_OUT = 4.7 µF, C_IN = 4.7 µF, I_OUT = 50 ↔ 100 mA
3.20
150
3.15
100
IOUT
3.10
50
3.05
0
VOUT
3.00
−50
2.95
−100
2.90
−150
−200 0 200 400 600 800 1000 1200
t [µs]
V_IN = 4.0 V, C_OUT = 4.7 µF, C_IN = 4.7 µF, I_OUT = 100 ↔ 500 mA
3.40
600
3.30 _IOUT
400
3.20
200
3.10
3.00
2.90
2.80
2.70
VOUT
0
−200
−400
−600
−800
−200 0 200 400 600 800 1000 1200
t [µs]
22
Seiko Instruments Inc.