R1221N RICOH electronics devices division, R1221N Datasheet - Page 20

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

18) Turn-on Waveform
Rev. 1.11
3.4
3.3
3.2
3.1
2.9
2.8
2.7
2.6
2.5
2.4
-0.5
-1.5
-2.5
-3.5
3.5
2.5
1.5
0.5
3
-1
-2
-3
3.4
3.3
3.2
3.1
2.9
2.8
2.7
2.6
2.5
2.4
12345
3
2
1
0
-0.01
0
3
0
R1221N33AA
R1221N33AD
R1221N33AC
Time (sec)
Time (sec)
0.0005
0
0.0005
(V
Time (sec)
IN
=10V,I
OUT
0.01
V
L=27uH
=0mA)
IN
V
L=27uH
0.001
IN
=5V
0.001
=5V
500
0.1
500
0.1
L=27uH
0.02
10
0
- 20 -
3.6
3.5
3.4
3.3
3.2
3.1
2.9
2.8
2.7
2.6
3.6
3.5
3.4
3.3
3.2
3.1
2.9
2.8
2.7
2.6
-0.5
-1.5
-2.5
-3.5
3.5
2.5
1.5
0.5
3
3
-1
-2
-3
3
2
1
0
-0.01
0
0
R1221N33AA
R1221N33AD
R1221N33AC
Time (sec)
Time (sec)
0
Time (sec)
0.05
(V
0.05
IN
=5V,I
OUT
0.01
=0mA)
V
L=27uH
IN
V
L=27uH
IN
=5V
=5V
0.1
0.1
L=27uH
500
0.1
500
0.1
0.02
5
0