n
TYPICAL CHARACTERISTCS
1) Output Voltage vs. Output Current
R1221N33AH
3.400
3.380
3.360
3.340
3.320
3.300
3.280
3.260
3.240
3.220
3.200
L=27uH
1.520
R1221N15XH
L=27uH
Output Voltage V
OUT
(V)
Output Voltage V
OUT
(V)
1.515
1.510
1.505
1.500
1.495
1.490
1.485
1.480
13.2V
8V
5V
2.3V
12V
8V
4.5V
1E-05 0.0001 0.001 0.01
0.1
Output Current
I
OUT
(A)
2) Efficiency vs. Output Current
1
1E-05 0.0001 0.001 0.01
0.1
Output Current
I
OUT
(A)
1
R1221N33AA(VIN=4.5V)
100
90
80
70
60
50
40
30
20
10
0
0.1
CD104-27uH
Si3443DV
R1221N33AA(VIN=12V)
Si3443DV
100
90
80
70
60
50
40
30
20
10
0
0.1
1
10
100
Output Current
I
OUT
(mA)
CD104-27uH
Efficiency (%)
Efficiency (%)
1
10
100
Output Current
I
OUT
(mA)
R1221N33AC(VIN=4.5V)
1000
1000
CD104-27uH
Si3443DV
R1221N33AB(VIN=12V)
Si3443DV
100
80
Efficiency (%)
60
40
20
0
CD104-27uH
100
80
Efficiency (%)
60
40
20
0
0.1
1
10
100
Output Current I
OUT
(mA)
1000
0.1
1
10
100
Output Current
I
OUT
(mA)
1000
12345
Rev. 1.11
- 11 -
RICOH [ RICOH ELECTRONICS DEVICES DIVISION ]
