S-L2980_1 Datasheet, PDF (17/23 Pages) Seiko Instruments Inc – HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR

Rev.4.1_00
HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
S-L2980 Series
8. Threshold voltage of ON/OFF pin versus Input voltage
S-L2980A15
R_L=100 Ω, C_IN=4.7 μF, C_L=10 μF
1.5
85°C ^{25°C Ta=–40°C}
1.0
0.5
85°C _{25°C Ta=–40°C}
0.0
0 2 4 6 8 10 12
V_IN [V]
9. Current consumption versus Input voltage
S-L2980A15
100
80
60
25°C 85°C
Ta=–40°C
40
20
0
0
2
4
6
8
10
V_IN [V]
S-L2980A50
100
80
60
25°C ^85°C
40
Ta=–40°C
20
0
0
2
4
6
8
10
V_IN [V]
10. Ripple rejection
S-L2980A30 (Ta=25°C)
100
V_IN=4.0 V, C_L=2.2 μF
80
I_OUT=1 mA
60
S-L2980A30
100
80
60
40
20
0
0
25°C ^85°C
Ta=–40°C
2
4
6
8
10
V_IN [V]
S-L2980A50 (Ta=25°C)
100
80
60
V_IN=6.0 V, C_L=2.2 μF
I_OUT=1 mA
40
20
50 mA
0
10 100
1k
10 k 100 k 1 M
Frequency [Hz]
40
20
50 mA
0
10 100
1k
10 k 100 k 1 M
Frequency [Hz]
Seiko Instruments Inc.
17