R1121N_17 Datasheet, PDF (12/18 Pages) RICOH electronics devices division – LOW NOISE 150mA LDO REGULATOR

R1121N
7) Dropout Voltage vs. Set Output Voltage
R1121Nxx1B
Topt = 25
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
80
70
60
50
40
30
20
10
0
0.1
VIN = 2.8VDC + 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
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)
12