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TL431的详细信息

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SMD Type  
IC  
Adjustable Accurate Reference Source  
TL431  
SOT-23  
2.9 0.1  
Unit: mm  
0.4 0.1  
3
Features  
The output voltage can be adjusted to 36V  
Low dynamic output impedance, its typical value is 0.2  
Trapping current capability is 1 to 100mA  
The typical value of the equivalent temperature factor in the  
whole temperature scope is 50 ppm/  
1
2
+0.05  
-0.01  
0.1  
0.95 0.1  
1.9 0.1  
The effective temperature compensation in the working  
range of full temperature  
1.Reference  
2.Cathode  
3.Anode  
Low output noise voltage  
Fast on-state response  
Absolute Maximum Ratings (Operating temperature range applies unless otherwise specified)  
Parameter  
Symbol  
VKA  
Rating  
37  
Unit  
V
Cathode Voltage  
Cathode Current Range (Continuous)  
Reference Input Current Range  
Power Dissipation  
IKA  
mA  
mA  
mW  
-100  
+150  
+10  
IREF  
PD  
0.05  
350  
Operating Temperature  
TOPR  
TSTG  
0
70  
Storage Temperature Range  
-65  
+150  
Electrical Characteristics (Ta = 25 unless otherwise specified)  
Parameter  
Symbol  
VREF  
Testconditons  
VKA = VREF , IKA = 10mA  
VKA = VREF , IKA = 10mA  
Min  
2.45  
Typ  
2.5  
Max  
Unit  
V
Reference Input Voltage  
2.55  
17  
Deviation of Reference Input Voltage  
4.5  
mV  
VREF/  
T
Over Temperature  
(*)  
Tmin  
Ta  
Tmax  
Ratio of Change in Reference Input Voltage  
to the Change in Cathode Voltage  
Reference Input Current  
-1.0  
-0.5  
1.5  
-2.7 mV/V  
-2.0 mV/V  
IKA = 10mA , VKA = 10V  
IKA = 10mA , VKA = 36V  
VREF  
VREF/ VKA  
10V  
IREF  
4
IKA = 10mA , R1 = 10K , R2 =  
IKA = 10mA , R1 = 10K , R2 =  
TA = Full Temperature  
VKA = VREF  
A
A
Deviation of Reference Input Current  
Over Full Temperature Range  
0.4  
1.2  
IREF/  
T
Minimum Cathode Current for Regulation  
Off-state Cathode Current  
IKA(min)  
0.45  
0.05  
1.0  
1.0  
mA  
A
IKA(OFF)  
VKA = 36V, VREF = 0  
VKA = VREF, IKA = 1 to 100mA,  
Dynamic Impedance  
ZKA  
0.15  
0.5  
f
1.0KHz  
* TMIN = 0 , TMAX = +70  
1
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