R1121N Datasheet, PDF (11/16 Pages) RICOH electronics devices division – LOW NOISE 150mA LDO REGULATOR

7) Dropout Voltage vs. Set Output Voltage
R1121N××1B
Topt = 25°C
1.0
0.9
0.8
IOUT = 150mA
IOUT = 100mA
0.7
IOUT = 50mA
0.6
IOUT = 30mA
IOUT = 10mA
0.5
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
VIN = 2.8VDC + 0.5Vp-p
COUT = tantal 1.0µF
80
70
60
50
40
IOUT = 1mA
30
IOUT = 30mA
20
IOUT = 50mA
10
0
0.1
1
10
100
Frequency f (kHz)
80
70
60
50
40
30
20
10
0
0.1
R1121N301B
VIN = 4.0VDC + 0.5Vp-p
COUT = tantal 1.0µF
IOUT = 1mA
IOUT = 30mA
IOUT = 50mA
1
10
100
Frequency f (kHz)
80
70
60
50
40
30
20
10
0
0.1
80
70
60
50
40
30
20
10
0
0.1
R1121N181B
VIN = 2.8VDC + 0.5Vp-p
COUT = tantal 2.2µF
IOUT= 1mA
IOUT = 30mA
IOUT = 50mA
1
10
100
Frequency f (kHz)
R1121N301B
VIN = 4.0VDC + 0.5Vp-p
COUT = tantal 2.2µF
IOUT = 1mA
IOUT = 30mA
IOUT = 50mA
1
10
100
Frequency f (kHz)
Rev.1.11
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