R1224N122G RICOH [RICOH electronics devices division], R1224N122G Datasheet - Page 6

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

6
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R1224N
Istandby
Symbol
Maxdty
∆
V
V
∆
∆
∆
tstart
tprot
fosc
I
V
R1224N102X (X=G/H/M)
I
V
fosc/
I
V
Topt
Topt
I
I
V
EXTH
UVLO1
UVLO2
V
EXTL
DD1
CEH
CEL
CEH
CEL
FB
IN
FB
/
Operating Input Voltage
Feedback Voltage
Feedback Voltage
Temperature Coefficient
Oscillator Frequency
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
UVLO Voltage
UVLO Release Voltage
Delay Time by Soft-Start function
Delay Time for protection circuit
Item
V
−40°C
V
M Version
G Version
H Version
−40°C
V
M Version
G Version
H Version
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
IN
IN
IN
IN
IN
CE
IN
CE
IN
IN
IN
IN
IN
IN
IN
CE
IN
FB
=V
=V
=V
=18.5V, V
=8V, V
=8V, V
=V
=V
=8V, V
=8V, V
=V
=V
=2.5V, I
=V
=2.5V→0V
=8V
=8V
=0V→2.5V
CE
CE
CE
CE
FB
CE
CE
CE
< =
< =
=18.5V, V
=3.5V, I
=3.5V, I
=V
=V
=2.5V to 1.5V, V
=1.5V to 2.5V, V
=2.5V
Topt
Topt
EXT
EXT
FB
FB
FB
FB
FB
Conditions
=0V
=0V
=18.5V
=7.9V, V
=0.1V, V
=18.5V
=−10mA
CE
< =
< =
=0V, V
FB
FB
85°C
85°C
=−100mA
=−100mA
CE
=0V
FB
FB
FB
=8V,
=0V,
=0V
FB
FB
=0V
=0V
Min.
0.98
−0.5
144
240
400
100
2.3
1.5
1.8
20
5
5
V
±100
Typ.
1.00
±0.2
+0.1
180
300
500
−17
0.0
0.0
0.0
2.0
UVLO1
20
30
40
30
10
15
Max.
18.5
1.02
216
360
600
−10
0.5
0.5
0.3
2.2
2.3
50
60
80
20
30
Topt=25°C
ppm/°C
%/°C
Unit
kHz
mA
mA
ms
ms
µA
µA
µA
µA
%
V
V
V
V
V
V