R1221N RICOH electronics devices division, R1221N Datasheet - Page 14
R1221N
Manufacturer Part Number
R1221N
Description
Step-down DC/DC Converter with Voltage Detector
Manufacturer
RICOH electronics devices division
Datasheet
1.R1221N.pdf
(21 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
R1221N33AD
Manufacturer:
AD
Quantity:
121
Company:
Part Number:
R1221N33AH-TR
Manufacturer:
RICOH
Quantity:
5 556
4) Oscillator Frequency vs. Input Voltage
5) Output Voltage vs. Input Voltage
Rev. 1.11
600
500
400
300
200
100
1.53
1.52
1.51
1.50
1.49
1.48
1.47
200
180
160
140
120
100
80
60
40
20
0
0
12345
0
1
0
Output Current
R1221N33AC
R1221N15XB
R1221N15XB
Input Voltage
Input Voltage V
10
5
5
VIN4.5V
VIN8V
VIN12V
I
OUT
V
100
IN
10
IN
(mA)
10
(V)
L=27uH
C=47uF(Ta)
(V)
L=27uH
L=27uH
1000
15
15
- 14 -
1.53
1.52
1.51
1.50
1.49
1.48
1.47
600
500
400
300
200
100
200
180
160
140
120
100
80
60
40
20
0
0
0
1
0
Output Current
R1221N15XA
R1221N50XC
Input Voltage V
R1221N15XA
Input Voltage V
10
5
5
VIN6V
VIN8V
VIN12V
I
OUT
100
IN
10
IN
(V)
10
L=27uH
C=47uF(Ta)
(mA)
(V)
L=27uH
L=27uH
1000
15
15