7) Dropout Voltage vs. Set Output Voltage
R1121N××1B
Topt = 25°C
1.0
0.9
0.8
0.7
0.6
0.5
I
I
I
I
I
OUT = 150mA
OUT = 100mA
OUT = 50mA
OUT = 30mA
OUT = 10mA
0.4
0.3
0.2
0.1
0.0
1.0
2.0
3.0
4.0
5.0
Set Output Voltage Vreg (V)
8) Ripple Rejection vs. Frequency
R1121N181B
R1121N181B
V
IN = 2.8VDC + 0.5Vp-p
V
IN = 2.8VDC + 0.5Vp-p
C
OUT = tantal 1.0µF
C
OUT = tantal 2.2µF
80
80
70
60
50
40
30
20
10
0
70
60
50
40
30
20
10
0
I
OUT = 1mA
I
OUT= 1mA
I
OUT = 30mA
I
I
OUT = 30mA
OUT = 50mA
I
OUT = 50mA
0.1
1
10
100
0.1
1
10
100
Frequency f (kHz)
Frequency f (kHz)
R1121N301B
R1121N301B
V
IN = 4.0VDC + 0.5Vp-p
V
IN = 4.0VDC + 0.5Vp-p
C
OUT = tantal 1.0µF
C
OUT = tantal 2.2µF
80
80
70
60
50
40
30
20
10
0
70
60
50
40
30
20
10
0
I
I
I
OUT = 1mA
I
OUT = 1mA
I
OUT = 30mA
OUT = 50mA
OUT = 30mA
OUT = 50mA
I
0.1
1
10
100
0.1
1
10
100
Frequency f (kHz)
Frequency f (kHz)
Rev.1.11
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