r1121n RICOH Co.,Ltd., r1121n Datasheet - Page 13

• Manufacturer Part Number: r1121n
• Description: Low Noise 150ma Ldo Regulator
• Manufacturer: RICOH Co.,Ltd.

9)
Ripple Rejection vs. Input Voltage (DC bias)
80
70
60
50
40
30
20
10
80
70
60
50
40
30
20
10
80
70
60
50
40
30
20
10
0
0
0
3.1
0.1
3.1
3.2
3.2
R1121N401B
R1121N301B
R1121N301B
f = 400Hz
f = 1kHz
f = 10kHz
Input Voltage V
Input Voltage V
Frequency f (kHz)
1
I
I
I
OUT
OUT
OUT
C
V
= 1mA
= 30mA
= 50mA
OUT
IN
3.3
3.3
= 5.0V
= tantal 1.0µF
IN
IN
DC
(V)
I
C
(V)
10
OUT
+ 0.5Vp-p
OUT
I
C
f = 400Hz
f = 1kHz
f = 10kHz
OUT
OUT
3.4
3.4
= 1mA
= 2.2µF
= 50mA
= 2.2µF
100
3.5
3.5
80
70
60
50
40
30
20
10
80
70
60
50
40
30
20
10
0
0
0.1
3.1
3.2
R1121N401B
R1121N301B
Input Voltage V
Frequency f (kHz)
1
I
I
I
OUT
OUT
OUT
= 1mA
= 30mA
= 50mA
C
V
3.3
IN
OUT
= 5.0V
= tantal 2.2µF
IN
C
I
(V)
OUT
OUT
10
DC
f = 400Hz
f = 1kHz
f = 10kHz
+ 0.5Vp-p
= 2.2µF
3.4
= 10mA
R1121N
100
3.5
13