HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1111/1121 Series
Rev.4.1_00
(7) Ripple rejection
S-1111B15 (Ta = 25 °C)
VIN = 2.5 V, COUT = 2.2 μF
S-1111B30 (Ta = 25 °C)
VIN = 4.0 V, COUT = 2.2 μF
100
80
100
80
IOUT = 1 mA
IOUT = 1 mA
60
40
20
0
60
40
20
0
30 mA
30 mA
50 mA
100 k
50 mA
100 k
10
100
1 k
10 k
1 M
10
100
1 k
10 k
1 M
Frequency [Hz]
Frequency [Hz]
S-1111B50 (Ta = 25 °C)
VIN = 6.0 V, COUT = 2.2 μF
100
80
IOUT = 1 mA
60
40
20
0
30 mA
50 mA
100 k
10
100
1 k
10 k
1 M
Frequency [Hz]
20
Seiko Instruments Inc.