TL431K-3 Datasheet, PDF (1/3 Pages) Guangdong Kexin Industrial Co.,Ltd – Adjustable Accurate Reference Source

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-23-3
2.9 +0.2
-0.1
0.4 +0.1
-0.1
3
1
2
0.95 +0.1
-0.1
1.9 ^+0.1
-0.2
Unit: mm
0.15 ^+0.02
-0.02
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
357
150
0 ~ 70
-65 ~ 150
Unit
V
mA
mW
℃/W
℃
■ Electrical Characteristics Ta = 25℃（unless otherwise specified）
Parameter
Symbol
Test Conditions
Min Typ Max Unit
VKA=VREF,IKA=10mA
2.445
2.545
Reference Input Voltage(Fig.1)
Vref
RanK
0.5%
1%
2.482 2.495 2.508 V
2.47
2.52
Deviation of Reference Input Voltage Over
Temperature(Fig.1) Tmin=0℃ ,Tmax=+70℃
△Vref/△T
VKA=VREF,IKA=10mA
Tmin≤Ta≤Tmax
4.5 17 mV
Ratio Of Change in Reference lnput Voltage
to the Change in Cathode Voltage (Fig.2)
△Vref/△VKA
IKA=10mA
△VKA=VREF ~ 10V
△VKA=10V ~ 36V
-1.0 -2.7
mV/V
-0.5 -2.0
Reference Input Current
Iref
IKA=10mA,R1=10 kΩ,R2=∞
1.5 4
Deviation Of Reference Input Current
Over Full Temperature Range(Fig.2)
Iref / △T
IKA=10mA,R1=10 kΩ,R2=∞
Ta=full Temperature
uA
0.4 1.2
Minmum Cathode Current for Regulation(Fig.1) IKA(min) VKA=VREF
0.45 1.0 mA
Off-state Cathode Current(Fig.3)
IKA(OFF) VKA=40V, VREF=0
0.05 0.5 uA
Dynamic Impedance
ZKA
VKA=VREF, IKA=1to100mA ,f≤1.0 KHz
0.15 0.5 Ω
■ Marking
Marking
431
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