ꢀ ELECTRICAL CHARACTERISTICS
ꢀR1224Nxx2X (X=E/F/G/H/L/M) except R1224N102X
(Topt=25°C)
Symbol
Item
Conditions
MIN.
2.3
TYP. MAX. Unit
V
IN
Operating Input Voltage
Step-down Output Voltage
18.5
V
V
V
OUT
V =V +V
+1.5V, I
=-100mA
V
SET
×
V
SET
V
SET
×
IN
CE
SET
OUT
When V
≤2.0, then V =V =3.5V
0.98
1.02
SET
IN
CE
∆V
/
Step-down Output Voltage
Temperature Coefficient
Oscillator Frequency
-40°C ≤ Topt ≤ 85°C
±100
ppm
/°C
OUT
∆T
fosc
V =V =V
+1.5V, I
=-100mA
kHz
IN
CE
SET
OUT
When V
≤2.0, then V =V =3.5V
SET
IN
CE
L/M version
144
240
400
180
300
500
±0.2
216
360
600
E/G version
F/H version
∆f
/
Oscillator Frequency
Temperature Coefficient
Supply Current1
-40°C ≤ Topt ≤ 85°C
%
/°C
µA
OSC
∆T
I
V =V =V
=18.5V
DD1
IN
CE
OUT
E/F/L/M version
G version
20
30
50
70
90
0.5
H version
40
I
Standby Current
V =18.5V, V =0V, V
=0V
0.0
-17
30
µA
mA
mA
µA
µA
V
stb
IN
CE
OUT
I
EXT "H" Output Current
EXT "L" Output Current
CE "H" Input Current
CE "L" Input Current
CE "H" Input Voltage
CE "L" Input Voltage
V =8V,V
=7.9V,V
=8V,V =8V
CE
EXTH
IN
EXT
OUT
OUT
I
V =8V,V
=0.1V,V
=0V,V =8V
CE
EXTL
IN
EXT
I
V =V =V =18.5V
OUT
0.0
0.0
0.5
0.3
CEH
IN
CE
I
V = V
=18.5V, V =0V
-0.5
1.5
CEL
IN
OUT
CE
V
CEH
V =8V,V
=0V
=0V
IN
OUT
OUT
V
CEL
V =8V,V
IN
V
Maxdty Oscillator Maximum Duty Cycle
VFMdty VFM Duty Cycle
100
1.9
%
E/F/L version
V =V =2.5V to 1.5V, V
35
%
V
V
UVLO Voltage
=0V
=0V
2.0
2.2
2.3
V
UVLO1
IN
CE
OUT
OUT
UVLO Release Voltage
V =V =1.5V to 2.5V, V
V
1
V
UVLO2
IN
CE
UVLO
+0.1
10
T
Delay Time by Soft-Start function V =V
+1.5V, I
=-10mA
ms
ms
start
IN
SET
OUT
V
CE
=0V->V
+1.5V
SET
T
Delay Time for protection circuit
V =V =V
+1.5V
15
prot
IN
CE
SET
V
OUT
=V
+1.5V->0V
SET
12345
Rev. 0.06
- 5 -