R1221N RICOH electronics devices division, R1221N Datasheet - Page 11

• Manufacturer Part Number: R1221N
• Description: Step-down DC/DC Converter with Voltage Detector
• Manufacturer: RICOH electronics devices division

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