TL431 AUT
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TL431 - TL431
TL431/AUT
Adjustable output voltage: Sink current capability: Typical output impedance: 0.22 voltage precision SO-8 (Batwing plastic micropackage)
Description
TL431 programmable shunt voltage reference with guaranteed temperature stability over entire operating temperature range. TL431 temperature range extended create TL431/AUT which guaranteed range from -40° +125° This extension allows TL431/AUT used higher temperature environments such automotive applications. output voltage value between with external resistors. TL431 operates with wide current range from with typical dynamic impedance 0.22
2008
1/11
www.st.com
Schematic diagrams
TL431/AUT
Schematic diagrams
Figure SO-8 batwing connections (top view)
Cathode Anode Anode N.C. N.C. Anode Anode Reference
Figure
TL431 block diagram
Cathode Vref
Anode
Vref
2/11
TL431/AUT
Absolute maximum ratings operating conditions
Absolute maximum ratings operating conditions
Table
Symbol Iref Rthja Rthjc Tstg
Absolute maximum ratings
Parameter Cathode anode voltage Continuous cathode current range Reference input current range Thermal resistance junction ambient(1) SO-8 batwing Thermal resistance junction case SO-8 batwing Storage temperature range HBM: human body model Value -100 +150 -0.05 +150 2000 1500 Unit °C/W °C/W
machine model CDM: charged device model
Short-circuits cause excessive heating. These values typical.
Human body model: capacitor charged specified voltage, then discharged through resistor between pins device. This done couples connected combinations while other pins floating. Machine model: capacitor charged specified voltage, then discharged directly between pins device with external series resistor (internal resistor This done couples connected combinations while other pins floating. Charged device model: pins package charged together specified voltage then discharged directly ground through only pin. This done pins.
Table
Symbol Toper
Operating conditions
Cathode anode voltage Cathode current
Operating free-air temperature range
Parameter
Value Vref +125
Unit
3/11
Electrical characteristics
TL431/AUT
Table
Symbol
Electrical characteristics
Tamb 25°C (unless otherwise specified)
TL431 Parameter Min. Reference input voltage Vref 10mA Tmin Tamb Tmax Reference input voltage deviation over temperature range Vref 10mA, Tmin Tamb Tmax Ratio change reference input voltage change cathode anode voltage 10mA, Vref 10mA, Reference input current 10mA, Tmin Tamb Tmax Reference input current deviation over temperature range 10mA, Tmin Tamb Tmax Minimum cathode current regulation Vref Off-state cathode current Tmin Tamb Tmax Dynamic impedance Vref to100mA, 1kHz Typ. Max. Min. Typ. Max. TL431A Unit
Vref
2.44 2.495 2.55 2.41 2.58
2.47 2.495 2.52 2.44 2.55
Vref
Vref -Vka
-2.7
-1.4
-2.7
-1.4
Iref
Iref
Imin Ioff
definition Reference input voltage deviation over temperature range below. dynamic impedance defined ZKA|
Reference input voltage deviation over temperature range
Vref defined difference between maximum minimum values obtained over full temperature range. Vref Vref Vref
Reference input voltage deviation over temperature range
0.22
mV/V
1000 3000
1000 3000
0.22
Figure
max.
min. Temperature
4/11
TL431/AUT
Electrical characteristics
Figure
Test circuit Vref
Figure
Input
Test circuit programming mode
Output
Input
IK=10mA
Output
IREF
VREF
VREF
VREF IREF
Figure
Test circuit Ioff
Figure
Test circuit phase margin voltage gain
VKA=36V
IOFF
Figure
Test circuit response time
Output
IK=1mA
Input
8.25k
VREF
IK=10mA
Output
5/11
Electrical characteristics
TL431/AUT
Figure
Reference voltage temperature
Figure Reference voltage cathode current
2.54 Cathode voltage
Cathode current (mA)
2.52
VREF
TAMB=+25°C
2.50
2.48
2.46
2.44
Temperature (°C)
Cathode voltage
Figure Reference voltage cathode current
Figure Reference current temperature
Reference current IREF
Cathode current (mA)
TAMB +25°C
Cathode voltage
Figure Off-state cathode current temperature
Off-state current IOFF
VREF
K=10 1=10k
Temperature
Figure Ratio change Vref change temperature
-0.5
-1.0
-1.5
-2.0
Temperature
Temperature
6/11
TL431/AUT
Electrical characteristics
Figure Static impedance temperature
0.20
Figure Minimum operating current temperature
Minimum cathode current IMIN (mA)
Static impedance
0.18
KA=V
0.16
0.14
0.12
0.10
Temperature
Temperature
Figure Gain phase frequency
Figure Stability behavior with capacitive loads
VKA=VREF
Gain IK=10 figure
Cathode current (mA)
VKA=5
Gain (dB)
Phase
Phase
-100 -150 Frequency (kHz) 1000
Figure Maximum power dissipation
Cathode current (mA)
Input Output voltage
-200 10000
1E-10
1E-9
Instable Area
VKA=12
VKA=24
1E-8
1E-7
1E-6
1E-5
Capacitive load (Farad)
Figure Pulse response
Input
Output
VKA=VREF TAMB=+25°C
Safe area atwing
athode voltage
Time
7/11
Package information
TL431/AUT
Package information
order meet environmental requirements, STMicroelectronics offers these devices ECOPACK® packages. These packages have lead-free second level interconnect. category second level interconnect marked package inner label, compliance with JEDEC Standard JESD97. maximum ratings related soldering conditions also marked inner label. ECOPACK STMicroelectronics trademark. ECOPACK specifications available www.st.com.
8/11
TL431/AUT Figure SO-8 package mechanical drawing
Package information
Table
SO-8 package mechanical data
Ref. Min.
Millimeters Typ.
0.10
1.25 0.28 0.17 4.80 5.80 3.80
4.90 6.00 3.90 1.27
Max.
Dimensions
Min.
Inches Typ. Max.
1.75
0.069 0.004 0.049 0.010
0.25
0.48 0.23 5.00 6.20 4.00
0.011 0.007 0.189 0.228 0.150 0.193 0.236 0.154 0.050
0.019 0.010 0.197 0.244 0.157
0.25 0.40
0.50 1.27 0.10
0.010 0.016
0.020 0.050 0.004
9/11
Ordering information
TL431/AUT
Ordering information
Table Order codes
Temperature range Package Packing Marking
Order code
TL431ID/AUT TL431IDT/AUT SO-8 batwing TL431AID/AUT TL431AIDT/AUT TL431UYD(1) TL431UYDT(1) TL431AUYD(1) TL431AUYDT(1) -40°C 125°C SO-8 batwing (Automotive grade)
Tube Tape reel
431IA 431AIA 431UY 431AUY
Tube Tape reel
Qualification characterization according Q100 Q003 equivalent, advanced screening according Q001 equivalent on-going.
Revision history
Table
Date
Document revision history
Revision
27-May-2008
Initial release.
Changes
10/11
TL431/AUT
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11/11
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