r1121n RICOH Co.,Ltd., r1121n Datasheet - Page 12

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

12
7)
8)
R1121N
Dropout Voltage vs. Set Output Voltage
Ripple Rejection vs. Frequency
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
80
70
60
50
40
30
20
10
80
70
60
50
40
30
20
10
0
0
1.0
0.1
0.1
2.0
Set Output Voltage Vreg (V)
R1121Nxx1B
R1121N181B
R1121N301B
Frequency f (kHz)
Frequency f (kHz)
I
1
1
I
I
I
I
I
OUT
OUT
OUT
OUT
OUT
OUT
= 50mA
= 1mA
= 30mA
= 30mA
= 50mA
= 1mA
C
C
V
V
3.0
OUT
OUT
IN
IN
= 2.8V
= 4.0V
= tantal 1.0µF
= tantal 1.0µF
I
I
I
I
I
OUT
OUT
OUT
OUT
OUT
10
10
Topt = 25°C
DC
DC
= 150mA
= 100mA
= 50mA
= 30mA
= 10mA
4.0
+ 0.5Vp-p
+ 0.5Vp-p
100
100
5.0
80
70
60
50
40
30
20
10
80
70
60
50
40
30
20
10
0
0
0.1
0.1
R1121N181B
R1121N301B
Frequency f (kHz)
Frequency f (kHz)
1
I
I
1
I
I
I
I
OUT
OUT
OUT
OUT
OUT
OUT
= 1mA
= 30mA
= 50mA
= 1mA
= 30mA
= 50mA
C
V
C
V
OUT
IN
IN
OUT
= 4.0V
= 2.8V
= tantal 2.2µF
= tantal 2.2µF
10
10
DC
DC
+ 0.5Vp-p
+ 0.5Vp-p
100
100