R1221N RICOH electronics devices division, R1221N Datasheet - Page 5

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

Symbol
VFMdty
D
DV
Maxdty
Note: Refer to Test Circuits
Rev. 1.11
Df
-V
tV
I
I
V
I
V
V
V
T
-
lR1221N***B(D,F,H) Output Voltage : Vo, Detector Threshold : V
I
T
fosc
I
EXTH
I
VDLK
I
EXTL
V
V
DD1
I
CEH
DT
DT
CEL
VDL
DT
OSC
OUT
CEH
HYS
CEL
start
stb
prot
OUT
DET
DET
DET
IN
/
/
/
VFM Duty Cycle
Operating Input Voltage
Step-down Output Voltage
Step-down Output Voltage
Temperature Coefficient
Oscillator Frequency
Frequency Temperature
Coefficient
Supply Current1
Standby Current
EXT "H" Output Current
EXT "L" Output Current
CE "H" Input Current
CE "L" Input Current
CE "H" Input Voltage
CE "L" Input Voltage
Oscillator Maximum Duty Cycle
Delay Time by Soft-Start
function
Delay Time for protection circuit V
VD
VD
Detector Threshold
Output Delay Time for Released
Voltage
Detector Threshold Hysteresis
Detector Threshold
Temperature Coefficient
OUT
OUT
Output Leakage Current V
“L” Output Current
Item
V
V
V
V
V
V
V
V
V
V
Applied to B and F versions only
V
At 80% of rising
V
V
V
At 80% of rising
V
-40°C £ Topt £ 85°C
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
=V
=V
=13.2V,V
=13.2V,V
=8V,V
=8V,V
=13.2V,V
=13.2V,V
=8V,V
=8V,V
=Vo+1.2V,V
=Vo+1.2V,V
=V
=V
=6V, V
=6V, V
=6V, V
CE
CE
OUT
OUT
- 5 -
=Vo+1.2V, I
=Vo+1.2V, I
-40°C £ Topt £ 85°C
-40°C £ Topt £ 85°C
EXT
EXT
CE
CE
=V
=2.3V,V
CE
CE
CE
=0V®1.5V
=1.5V®0V
CE
CE
CE
CE
=6V, V
=6V, V
=6V, V
CE
=7.9V,V
=0.1V,V
Conditions
=13.2V,V
=0V,V
=13.2V,V
=0V,V
=V
CE
CE
=0V®Vo+1.2V
=Vo+1.2V®0V
CE
DOUT
OUT
OUT
OUT
OUT
OUT
=0V, V
OUT
OUT
OUT
OUT
D
=8V
=V
=0V®V
=0V®V
=-10mA
=-100mA
OUT
OUT
=8V,V
=0V,V
=0V
=13.2V
D
DOUT
´1.2V®0V
=13.2V
=13.2V
CE
CE
D
D
´1.2V
´1.2V
=0.1V
=8V
=0V
MIN. TYP. MAX.
0.98
0.98
0.01
Vo´
V
V
400
-0.5
100
2.3
0.3
0.5
1.5
10
3
1
D
D
´
´
±100
±100
±0.3
0.03
V
500
140
-10
0.8
0.8
3.5
Vo
V
20
25
0
0
0
6
2
0
1
D
D
´
12345
13.2
1.02
1.02
0.05
Vo´
V
V
600
200
0.5
0.5
1.2
0.5
6.0
10
-6
4
D
D
´
´
(Topt=25°C)
Note*
C
D
D
G
A
A
B
E
E
F
F
F
J
J
J
I
I
ppm/
ppm/
Unit
kHz
mA
mA
mA
mV
ms
ms
ms
%/
mA
mA
mA
mA
mA
°C
°C
°C
%
%
V
V
V
V
V