R1224N122G RICOH [RICOH electronics devices division], R1224N122G Datasheet - Page 5

• Manufacturer Part Number: R1224N122G
• Description: PWM/VFM step-down DC/DC Converter
• Manufacturer: RICOH [RICOH electronics devices division]

•
ELECTRICAL CHARACTERISTICS
Istandby
Symbol
VFMdty
Maxdty
∆
∆
V
V
∆
∆
tstart
tprot
V
I
V
R1224Nxx2X (X=E/F/G/H/L/M) except R1224N102X
fosc
I
V
V
fosc/
I
Topt
Topt
I
I
EXTH
UVLO1
UVLO2
V
EXTL
CEH
DD1
CEL
OUT
CEH
CEL
OUT
IN
/
Oscillator Frequency
Delay Time for protection circuit
Operating Input Voltage
Step-down Output Voltage
Step-down Output Voltage
Temperature Coefficient
Oscillator Frequency
Temperature Coefficient
Supply Current 1
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
VFM Duty Cycle
UVLO Voltage
UVLO Release Voltage
Delay Time by Soft-Start function
Item
V
When V
−40°C
V
When V
L/M Version
E/G Version
F/H Version
−40°C
V
E/F/L/M Version
G version
H version
V
V
V
V
V
V
V
V
V
E/F/L Version
V
V
V
V
V
V
IN
IN
IN
IN
IN
CE
IN
CE
IN
IN
IN
IN
IN
IN
IN
CE
IN
OUT
=V
=V
=V
=18.5V, V
=8V, V
=8V, V
=V
=V
=8V, V
=8V, V
=V
=V
=V
=V
=8V
=8V
=0V→V
=V
CE
CE
CE
CE
OUT
CE
CE
SET
CE
< =
< =
SET
=V
=V
=V
=V
=2.5V to 1.5V, V
=1.5V to 2.5V, V
=V
SET
SET
+1.5V, I
=18.5V, V
Topt
Topt
EXT
EXT
OUT
OUT
+1.5V→0V
SET
SET
OUT
OUT
SET
Conditions
SET
< =
< =
=7.9V, V
=0.1V, V
=0V
=0V
CE
+1.5V, I
+1.5V, I
+1.5V
=18.5V
=18.5V
1.5V, V
1.5, V
+1.5V
< =
< =
=0V, V
OUT
85°C
85°C
CE
=−10mA
IN
=0V
OUT
OUT
OUT
OUT
IN
=V
OUT
=V
=−100mA
=−100mA
=8V,
=0V,
CE
OUT
OUT
=0V
CE
=3.0V
=0V
=0V
=3.0V
×0.98
Min.
−0.5
V
144
240
400
100
2.3
1.5
1.8
20
5
5
SET
V
±100
Typ.
±0.2
+0.1
V
180
300
500
−17
0.0
0.0
0.0
2.0
UVLO1
20
30
40
30
35
10
15
SET
×1.02
Max.
18.5
V
216
360
600
−10
0.5
0.5
0.3
2.2
2.3
50
60
80
20
30
SET
R1224N
Topt=25°C
ppm/°C
%/°C
Unit
kHz
mA
mA
µA
µA
µA
µA
ms
ms
%
%
V
V
V
V
V
V
5