TL431K Datasheet, PDF (1/3 Pages) SeCoS Halbleitertechnologie GmbH – Adjustable Shunt Regulator

SMD Type
IC
Adjustable Accurate Reference Source
TL431K (KL431K)
■ Features
● The output voltage can be adjusted to 36V
● Low dynamic output impedance, its typical value is 0.2Ω
● Trapping current capability is 1 to 100mA
● Low output noise voltage
● Fast on -state response
SOT-23
2.9 +0.1
-0.1
0.4 +0.1
-0.1
3
1
2
0.95 +0.1
-0.1
1.9 ^+0.1
-0.1
Unit: mm
0.1 +0.05
-0.01
1.REFERENCE
2.CATHODE
3.ANODE
■ Absolute Maximum Ratings Ta = 25℃
Parameter
Cathode Voltage
Cathode Current Range(Continuous)
Reference Input Current Range
Maximum Power Dissipation
Thermal Resistance from Juntion to Ambient
Operating Junction Temperature
Operating Junction Temperature Range
Storage Temperature Range
Symbol
VKA
IKA
Iref
PD
RθJA
Tj
Topr
Tstg
Rating
37
-100~+150
0.05~+10
300
417
150
0 ~ 70
-65 ~ 150
Unit
V
mA
mW
℃/W
℃
■ Electrical Characteristics Ta = 25℃（unless otherwise specified）
Parameter
Reference Input Voltage(Fig.1)
Deviation of Reference Input Voltage Over
Temperature(Fig.1) Tmin=0℃ ,Tmax=+70℃
Ratio Of Change in Reference lnput Voltage
to the Change in Cathode Voltage (Fig.2)
Reference Input Current
Symbol
Test Conditions
VKA=VREF,IKA=10mA
Vref
RanK
0.5%
1%
△Vref/△T
VKA=VREF,IKA=10mA
Tmin≤Ta≤Tmax
△Vref/△VKA
IKA=10mA
△VKA=VREF ~ 10V
△VKA=10V ~ 36V
Iref
IKA=10mA,R1=10 kΩ,R2=∞
Min
2.445
2.482
2.47
Deviation Of Renference Input Current
Over Full Temperatuure Range(Fig.2)
Iref / △T
IKA=10mA,R1=10 kΩ,R2=∞
Ta=full Temperature
Minmum Cathode Current for Regulation(Fig.1)
Off-state Cathode Current(Fig.3)
IKA(min)
IKA(OFF)
VKA=VREF
VKA=40V, VREF=0
Dynamic Impedance
ZKA
VKA=VREF, IKA=1 to 100mA,f≤1.0KHz
Typ
2.495
4.5
-1.0
-0.5
1.5
0.4
0.45
0.05
0.15
Max
2.545
2.508
2.52
17
-2.7
-2.0
4
1.2
1.0
0.5
0.5
Unit
V
mV
mV/V
uA
mA
uA
Ω
■ Marking
Marking
431
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