R1221N Datasheet, PDF (20/21 Pages) RICOH electronics devices division – Step-down DC/DC Converter with Voltage Detector

3.4
3.3
3.2
3.1
3
2.9
2.8
2.7
2.6
2.5
2.4
0
R1221N33AC
VIN=5V
L=27uH
500
0.0005
Time (sec)
0.1
0.001
3.4
3.3
3.2
3.1
3
2.9
2.8
2.7
2.6
2.5
2.4
0
R1221N33AD
VIN=5V
L=27uH
500
0.0005
Time (sec)
0.1
0.001
18) Turn-on Waveform
R1221N33AA(VIN=10V,IOUT=0mA) ^L=27uH
3.5
3
2.5
2
1.5
1
0.5
0
-0.5
-1
-1.5
-2
-2.5
-3
-3.5
-0.01
10
0
0
0.01
0.02
Time (sec)
3.6
3.5
3.4
3.3
3.2
3.1
3
2.9
2.8
2.7
2.6
0
3.6
3.5
3.4
3.3
3.2
3.1
3
2.9
2.8
2.7
2.6
0
R1221N33AC
VIN=5V
L=27uH
500
0.05
Time (sec)
0.1
0.1
R1221N33AD ^VIN=5V
L=27uH
500
0.05
Time (sec)
0.1
0.1
R1221N33AA(VIN=5V,IOUT=0mA) ^L=27uH
3.5
3
2.5
2
1.5
1
0.5
0
-0.5
-1
5
-1.5
-2
-2.5
-3
0
-3.5
-0.01
0
0.01
0.02
Time (sec)
12345
Rev. 1.11
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