Datasheet

UNISONIC TECHNOLOGIES CO., LTD
TL431TV
Preliminary
LINEAR INTEGRATED CIRCUIT
PROGRAMMABLE PRECISION
REFERENCE

DESCRIPTION
The UTC TL431TV is a three-terminal adjustable regulator with a
guaranteed thermal stability over applicable temperature ranges.
The output voltage may be set to any value between VREF
(approximately 2.5V) and 36V with two external resistors. It provides
very wide applications, including shunt regulator, series regulator,
switching regulator, voltage reference and others.

FEATURES
* Programmable output Voltage to 36V.
* Low dynamic output impedance 0.2Ω.
* Sink current capability of 1.0 to 100mA.
* Equivalent full-range temperature coefficient of 50ppm/°C
typical for operation over full rated operating temperature range.

ORDERING INFORMATION
Ordering Number
TL431TVG-AE2-R
Note: Pin Code: K: Cathode
A: Anode

Package
SOT-23-3
Pin Assignment
1
2
3
K
R
A
Packing
Tape Reel
R: Reference
MARKING
3
431TV
2
1
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Copyright © 2016 Unisonic Technologies Co., Ltd
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TL431TV

Preliminary
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
CATHODE
REFERENCE
CATHODE (K)
REFERENCE (R)
2.5V VREF
ANODE(A)
ANODE
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Preliminary
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (Operating temperature range applies, unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
Cathode Voltage
VKA
37
V
Cathode Current Range(Continuous)
IKA
-100 ~ +150
mA
Reference Input Current Range
IREF
-0.05 ~ +10
mA
Power Dissipation
PD
300
mW
Operating Junction
TJ
+150
°C
Operating Ambient
TOPR
-40 ~ +85
°C
Storage Temperature
TSTG
-65 ~ +150
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged
Absolute maximum ratings are stress ratings only and functional device operation is not implied.

RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
VKA
IKA
Cathode Voltage
Cathode Current

MIN
VREF
1
TYP
MAX
36
100
UNIT
V
mA
ELECTRICAL CHARACTERISTICS (TC= 25°C, unless otherwise specified.)
PARAMETER
Reference Input Voltage
SYMBOL
VREF
Deviation of reference Input Voltage Over
temperature
Ratio of Change in Reference Input
Voltage to the Change in Cathode Voltage
∆VREF
∆T
∆VREF
∆VKA
Reference Input Current
Deviation of Reference Input Current Over
Full Temperature Range
Minimum Cathode Current for Regulation
Off-State Cathode Current
Dynamic Impedance
IREF
∆IREF
∆T
IKA(MIN)
IKA(OFF)
ZKA
TEST CONDITIONS
TL431TV-A
TL431TV-1
VKA=VREF,IKA=10mA
TL431TV-2
TL431TV-3
VKA=VREF,IKA=10mA,
0°C ≤TA≤70°C
VKA=10V~VREF
IKA=10mA
VKA=36V~10V
IKA=10mA, R1=10kΩ, R2=∞
IKA=10mA, R1=10kΩ, R2=∞,
TA =full Temperature
VKA=VREF
VKA=36V, VREF=0
VKA=VREF, IKA=1~ 100mA,f≤1.0kHz
UNISONIC TECHNOLOGIES CO., LTD
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MIN TYP MAX UNIT
2.483 2.495 2.507 V
2.470 2.495 2.520 V
2.520
2.545 V
2.445
2.470 V
4.5
-1.0
-0.5
4.0
mV
-2.7 mV/V
-2.0 mV/V
6.0
µA
0.4
0.4
0.5
0.05
0.15
µA
1.0
1.0
0.5
mA
µA
Ω
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Preliminary
LINEAR INTEGRATED CIRCUIT
TEST CIRCUIT
VKA
INPUT
IKA
UTC TL431
VREF
VKA=VREF×(1+R1/R2)+IREF×R1
For VKA≥VREF
For VKA=VREF

For IKA(OFF)
APPLICATION CIRCUIT
VOUT=(1+R1/R2)×VREF
Minimum VOUT=VREF+5V
Output Control of a Three
-Terminal Fixed Regulator
VOUT=(1+R1/R2)×VREF
Shutdown Regulator
VIN
VOUT
VIN
IOUT
VOUT=(1+R1/R2)×VREF
Higher-current Shunt Regulator
IOUT
VOUT
RCL
RS
RS
UTC
TL431
IOUT=VREF/RS
Constant-current Sink
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UTC
TL431
IOUT =VREF/RCL
Current Limiting or Current Source
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Preliminary
LINEAR INTEGRATED CIRCUIT
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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www.unisonic.com.tw
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