R1221N Datasheet, PDF (4/21 Pages) RICOH electronics devices division – Step-down DC/DC Converter with Voltage Detector

n ELECTRICAL CHARACTERISTICS
lR1221N***A(C,E,G) Output Voltage : Vo, Detector Threshold : VD
(Topt=25°C)
Symbol
Item
Conditions
MIN. TYP. MAX. Note* Unit
VIN Operating Input Voltage
2.3
13.2
V
VOUT Step-down Output Voltage
VIN=VCE=Vo+1.2V, IOUT=-10mA
Vo´ Vo Vo´ A V
0.98
1.02
DVOUT/ Step-down Output Voltage
-40°C £ Topt £ 85°C
±100
ppm/
DT Temperature Coefficient
°C
fosc Oscillator Frequency
VIN=VCE=Vo+1.2V, IOUT=-100mA
240 300 360 A kHz
DfOSC/ Frequency Temperature
-40°C £ Topt £ 85°C
±0.3
%/
DT Coefficient
°C
IDD1 Supply Current1
VIN=13.2V,VCE=13.2V,VOUT=13.2V
100 160 B mA
Istb Standby Current
VIN=13.2V,VCE=0V,VOUT=0V
0 0.5 C mA
IEXTH EXT "H" Output Current
VIN=8V,VEXT=7.9V,VOUT=8V,VCE=8V
-10 -6 D mA
IEXTL EXT "L" Output Current
VIN=8V,VEXT=0.1V,VOUT=0V,VCE=0V 10 20
D mA
ICEH CE "H" Input Current
VIN=13.2V,VCE=13.2V,VOUT=13.2V
0 0.5 E mA
ICEL CE "L" Input Current
VIN=13.2V,VCE=0V,VOUT=13.2V
-0.5 0
E mA
VCEH CE "H" Input Voltage
VIN=8V,VCE=0V®1.5V
0.8 1.2 F V
VCEL CE "L" Input Voltage
VIN=8V,VCE=1.5V®0V
0.3 0.8
FV
Maxdty Oscillator Maximum Duty Cycle
100
%
VFMdty VFM Duty Cycle
Applied to B and F versions only
25
%
Tstart Delay Time by Soft-Start
VIN=Vo+1.2V,VCE=0V®Vo+1.2V
5 10 16 F ms
function
At 80% of rising
Tprot Delay Time for protection circuit VIN=Vo+1.2V,VCE=Vo+1.2V®0V
1 3 5 G ms
IVDLK VDOUT Output Leakage Current VIN=VOUT=VCE=VDOUT=8V
0 0.5 I mA
IVDL VDOUT “L” Output Current
VIN=VOUT=2.3V, VCE=0V, VDOUT=0.1V 0.5 1
I mA
-VDET Detector Threshold
VIN=6V, VCE=6V, VOUT=VD´1.2V®0V VD´ VD VD´ J V
0.98
1.02
tVDET Output Delay Time for Released VIN=6V, VCE=6V, VOUT=0V®VD´1.2V 2
5 10 J ms
Voltage
At 80% of rising
VHYS Detector Threshold Hysteresis VIN=6V, VCE=6V, VOUT=0V®VD´1.2V VD´ VD´ VD´ J mV
0.01 0.03 0.05
D-VDET/ Detector Threshold
-40°C £ Topt £ 85°C
±100
ppm/
DT Temperature Coefficient
°C
Note: Refer to Test Circuits
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Rev. 1.11
-4-