R1221N Datasheet, PDF (11/21 Pages) RICOH electronics devices division – Step-down DC/DC Converter with Voltage Detector

n TYPICAL CHARACTERISTCS
1) Output Voltage vs. Output Current
3.400
3.380
3.360
3.340
3.320
3.300
3.280
3.260
3.240
3.220
3.200
R1221N33AH
L=27uH
12V
8V
4.5V
1E-05 0.0001 0.001 0.01 0.1 1
Output Current IOUT(A)
2) Efficiency vs. Output Current
R1221N33AA(VIN=4.5V) ^CD104-27uH
Si3443DV
100
90
80
70
60
50
40
30
20
10
0
0.1
1
10
100
1000
Output Current IOUT(mA)
R1221N33AC(VIN=4.5V)
CD104-27uH
Si3443DV
100
80
60
40
20
0
0.1
1
10
100
Output Current IOUT(mA)
1000
1.520
R1221N15XH
L=27uH
1.515
1.510
1.505
1.500
1.495
1.490
1.485
13.2V
8V
5V
2.3V
1.480
1E-05 0.0001 0.001 0.01 0.1 1
Output Current IOUT(A)
100
90
80
70
60
50
40
30
20
10
0
0.1
R1221N33AA(VIN=12V)^{CSiD3414034D-2V7uH}
1
10
100
Output Current IOUT(mA)
1000
CD104-27uH
R1221N33AB(VIN=12V)_Si3443DV
100
80
60
40
20
0
0.1
1
10
100
Output Current IOUT(mA)
1000
Rev. 1.11
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