R1221N RICOH electronics devices division, R1221N Datasheet - Page 17

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

10) Soft-start Time vs. Temperature
11) Delay Time for Latch-type Protection vs. Temperature
12) Delay Time for Reset-type Protection vs. Temperature
Rev. 1.11
10
8
6
4
2
0
-50
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
5
4
3
2
1
0
-50
-50
R1221N33AB
R1221N33AH
R1221N33AB
Temperature Topt
0
Temperature Topt
Temperature Topt
0
0
50
50
50
(°C)
L=27uH
V
(°C)
V
V
(°C)
IN
IN
IN
=4.5V
=4.5V
=4.5V
100
100
100
- 17 -
12
10
8
6
4
2
5
4
3
2
1
0
-50
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
-50
-50
R1221N25XA
R1221N33AG
R1221N25XA
Temperature Topt
Temperature Topt
0
Temperature Topt
0
0
12345
50
50
50
V
L=27uH
V
(°C)
V
IN
(°C)
IN
(°C)
IN
=4.5V
=3.7V
=3.7V
100
100
100