R1223N Datasheet, PDF (5/19 Pages) RICOH electronics devices division – PWM/VFM Step-down DC/DC Converter

lR1223N**2B(,D,F,H) Output Voltage : Vo
Symbol
Item
Conditions
VIN Operating Input Voltage
VOUT Step-down Output Voltage
VIN=VCE=Vo+1.2V,IOUT=-10mA
DVOUT/ Step-down Output Voltage
-40°C £ Topt £ 85°C
DT Temperature Coefficient
fosc Oscillator Frequency
VIN=VCE=Vo+1.2V,IOUT=-100mA
DfOSC/ Oscillator Frequency
-40°C £ Topt £ 85°C
DT Temperature Coefficient
IDD1 Supply Current1
VIN=13.2V,VCE=13.2V,VOUT=13.2V
Istb Standby Current
VIN=13.2V,VCE=0V,VOUT=0V
IEXTH EXT "H" Output Current
VIN=8V,VEXT=7.9V,VOUT=8V,VCE=8V
IEXTL EXT "L" Output Current
VIN=8V,VEXT=0.1V,VOUT=0V,VCE=8V
ICEH CE "H" Input Current
VIN=13.2V,VCE=13.2V,VOUT=13.2V
ICEL CE "L" Input Current
VIN=13.2V,VCE=0V,VOUT=13.2V
VCEH CE "H" Input Voltage
VIN=8V,VOUT=0V®1.5V
VCEL CE "L" Input Voltage
VIN=8V,VOUT=1.5V®0V
Maxdty Oscillator Maximum Duty Cycle
VFMdty VFM Duty Cycle
only for B, F version
Tstart Delay Time by Soft-Start function VIN= Vo+1.2V, VCE=0V® Vo+1.2V
specified at 80% for rising edge
Tprot Delay Time for protection circuit VIN=VCE=Vo+1.2V
VOUT= Vo+1.2V®0V
MIN.
2.3
Vo´
0.98
400
10
-0.5
0.3
100
3
1
(Topt=25°C)
TYP. MAX. Unit
13.2 V
Vo Vo´ V
1.02
±100
ppm
/°C
500 600 kHz
±0.3
%
/°C
140 200 mA
0
0.5 mA
-10 -6 mA
20
mA
0
0.5 mA
0
mA
0.8 1.2 V
0.8
V
%
25
%
6
10 ms
2
4 ms
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Rev. 1.11
-5-