Programmable Precision Reference
Features
Programmable output voltage to 36V.
Low dynamic output impedance.
Sink current capability of 1.0 to 100mA.
Low output noise voltage
Fast turn on response
Marking: TL431: 431
TL431A: 431A
TL431/TL431A
SOT-23
Application
It provides very wide applications, including shunt
regulator,series regulator,switching regulator,voltage
reference and others.
1:Reference
(R)
2:Cathode
(K)
3:Anode(A)
Absolute Maximum Ratings
(Ta=25℃
unless otherwise specified
)
Symbol
V
KA
I
KA
I
REF
P
D
T
J
T
OPR
T
STG
Cathode Voltage
Cathode Current Range(Continuous)
Reference Input Current Range
Power Dissipation
Operating Junction
Parameter
Rating
37
-100 ~ +150
-0.05 ~ +10
350
+150
Units
V
mA
mA
mW
°C
°C
°C
Operating Ambient
Storage Temperature
-40 ~ +85
-65 ~ +150
Recommended Operating Conditions
Symbol
V
KA
I
KA
Parameter
Cathode Voltage
Cathode Current
Min.
V
REF
1
Typ.
-
-
Max.
36
100
Units
V
mA
www.pingjingsemi.com
Revision：1.0 Jun-2018
1/4
Programmable Precision Reference
Electrical Characteristics
(Ta=25℃
unless otherwise specified
)
Symbol
V
REF
TL431/TL431A
Parameter
Test Conditions
V
KA
=V
REF
, I
KA
=10mA
TL431
TL431A
Min. Typ.
Max.
Unit
2.44
2.48
2.495
2.495
2.55
2.51
V
V
Reference Input Voltage
∆V
REF
Deviation of
Reference
Input Voltage
Over
Temperature
Ratio of Change in Reference Input Voltage to
the Change in Cathode Voltage
V
KA
=V
REF
,I
KA
=10mA,
-40°C
≤T
A
≤+85°C
V
KA
=10V~V
REF
I
KA
=10mA
V
KA
=36V~10V
4.5
-1.0
-0.5
1.5
17
-2.7
-2.0
4
mV
mV/V
mV/V
µA
∆V
REF
∆V
KA
I
REF
Reference Input Current
Deviation of Reference Input Current Over Full
Temperature Range
I
KA
=10mA, R1=10kΩ, R2=∞
∆I
REF
I
KA
=10mA, R1=10kΩ, R2=∞,
-25°C ≤T
A
≤+85°C
V
KA
=V
REF
V
KA
=36V, V
REF
=0
V
KA
=V
REF
, I
KA
=1~ 100mA,f≤1.0kHz
0.4
1.2
µA
I
KA(MIN)
I
KA(OFF)
Z
KA
Minimum Cathode Current for Regulation
Off-State Cathode Current
Dynamic Impedance
0.45
0.05
0.15
1
1.0
0.5
mA
µA
Ω
www.pingjingsemi.com
Revision：1.0 Jun-2018
2/4
Programmable Precision Reference
Typical Characteristic Curves
150
Cathode Current (mA)
Cathode Current vs. Cathode Voltage
800
Cathode Current (μA)
600
400
200
0
-200
-2
Cathode Current vs. Cathode Voltage
T
A
=25°C
V
KA
=V
REF
TL431/TL431A
T
A
=25°C
125 V =V
KA
REF
100
75
50
25
0
-25
-50
I
KA(MIN
)
-75
-100
-2
-1
0
1
2
Cathode Voltage (V)
3
-1
0
1
2
Cathode Voltage (V)
Pulse Response
3
Change In Reference Input Voltage (mV)
0
-5
-10
-15
-20
-25
-30
-35
-40
0
Input and Output Voltage (V)
40
Change in Reference Input Voltage vs.
Cathode Voltage
I
KA
=10mA
T
A
=25°C
7
6
5
4
3
2
1
0
-1
T
A
=25°C
5
10
15
20
25
30
35
-1
0
1
Cathode Voltage (V)
2
3
4
Time (µs)
5
6
7
www.pingjingsemi.com
Revision：1.0 Jun-2018
3/4
Programmable Precision Reference
Package Outline
SOT-23
TL431/TL431A
0.8
Min.
0.900
0.000
0.300
0.080
2.800
1.200
2.250
1.800
0.300
0
o
Typ.
1.025
0.050
0.400
0.115
2.900
1.300
2.400
1.900
0.550REF
Max.
1.150
0.500
0.150
3.000
1.400
2.550
2.000
0.500
8
o
0.100
A
A1
b
c
D
E
HE
e
L1
L
θ
1.0
Symbol
Dimensions in millimeter
0.8
1.0
1.9
SOT-23 (TO-236)
Recommended
soldering pad
Ordering
Information
Device
TL431/TL431A
Package
SOT-23
Shipping
3000PCS/Reel&Tape
www.pingjingsemi.com
Revision：1.0 Jun-2018
2.2
4/4
嵌入式系统
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
