S1172 Datasheet, PDF (24/35 Pages) Seiko Instruments Inc – HIGH RIPPLE-REJECTION LOW DROPOUT

HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1172 Series
Rev.2.2_01
4. Characteristics of inrush current (Ta = +25°C)
S-1172B10
V_IN = 2.0 V, C_OUT = 4.7 μF, C_IN = 4.7 μF, I_OUT = 100 mA
6
1.2
4
1.0
VON/OFF
2
0.8
0
VOUT
0.6
2
0.4
IOUT
4
0.2
6
0
50
0
50 100 150 200
t [μs]
V_IN = 2.0 V, C_OUT = 4.7 μF, C_IN = 4.7 μF, I_OUT = 1000 mA
6
3.0
4
2.5
VON/OFF
2
2.0
0
VOUT
1.5
2
1.0
IOUT
4
0.5
6
500
0
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
6
1.2
VON/OFF
4
1.0
2
0.8
VOUT
0
0.6
2
0.4
IOUT
4
0.2
6
0
50
0
50 100 150 200
t [μs]
V_IN = 4.0 V, C_OUT = 4.7 μF, C_IN = 4.7 μF, I_OUT = 1000 mA
6
3.0
VON/OFF
4
2.5
2
2.0
VOUT
0
1.5
2
1.0
IOUT
4
0.5
6
500
0
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
6
1.2
4
VON/OFF
1.0
2
0.8
VOUT
0
0.6
2
0.4
IOUT
4
0.2
6
0
50
0
50 100 150 200
t [μs]
V_IN = 5.5 V, C_OUT = 4.7 μF, C_IN = 4.7 μF, I_OUT = 1000 mA
6
3.0
4 ^VON/OFF
2.5
2
VOUT
2.0
0
1.5
2
1.0
IOUT
4
0.5
6
500
0
0 500 1000 1500 2000
t [μs]
5. Example of equivalent series resistance vs. Output current characteristics (Ta = +25°C)
100
0
0.1
24
C_IN = C_L = 4.7 μF
Stable
I_OUT [mA]
VIN
1000
C_{IN S-1172 Series}
ON/OFF
VSS
VOUT
C_L^*1
R_ESR
*1. C_L: TAIYO YUDEN Co., Ltd. LMK316BJ475ML (4.7 μF)
Seiko Instruments Inc.