TLV431
1.24V COST EFFECTIVE SHUNT REGULATOR
Description
The TLV431 is a three-terminal, adjustable shunt regulator offering
excellent temperature stability and output current handling capability
up to 20mA. The output voltage may be set to any chosen voltage
between 1.24V and 18V by selection of two external divider resistors.
The TLV431 can be used as a replacement for zener diodes in many
applications requiring an improvement in zener performance.
The TLV431 is available in three grades with initial tolerances of 1%,
0.5%, and 0.2% for the A, B, and T grades respectively.
Pin Assignments
TLV431_H6 (SC70-6 [SOT363])
CATHODE
N/C
‡
REF
1
2
3
(Top View)
TLV431_F (SOT23)
REF
1
3
CATHODE
2
(Top View)
TLV431_E5 (SOT25)
N/C
N/C
‡
CATHODE
1
2
3
(Top View)
‡ Pin should be left floating or connect to anode
3.3 V
6 ANODE
5
4
NC
‡
NC
Features
•
•
•
Low-Voltage Operation V
REF
= 1.24V
Temperature Range -40 to +125°C
Reference Voltage Tolerance at +25°C
0.2%
TLV431T
0.5%
TLV431B
1%
TLV431A
Typical Temperature Drift
4mV (0°C to +70°C)
6mV (-40°C to +85°C)
11mV (-40°C to +125°C)
80µA Minimum Cathode Current
0.25Ω Typical Output Impedance
Adjustable Output Voltage V
REF
to 18V
Lead-Free Finish; RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
An Automotive-Compliant Part is Available Under Separate
Datasheet (TLV431Q)
ANODE
•
•
•
•
•
•
•
5
ANODE
4
REF
Typical Application Circuit
Secondary side
regulated supply
Primary side
controller
Optocoupler
I
F
R3
TLV431
R1
R2
GND
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and
Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
TLV431
Document number: DS32088 Rev. 7 - 2
1 of 15
www.diodes.com
© Diodes Incorporated
September 2019
TLV431
Absolute Maximum Ratings
(@T
A
= +25°C, unless otherwise specified.)
Symbol
V
KA
I
KA
I
REF
ESD Susceptibility
HBM
MM
CDM
Cathode Voltage
Continuous Cathode Current
Reference Input Current Range
Human Body Model
Machine Model
Charged Device Model
Parameter
Rating
20
-20 to +20
-0.05 to +3
4
400
1
Unit
V
mA
mA
kV
V
kV
Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when handling and
transporting these devices.
Parameter
Operating Junction Temperature
Storage Temperature
Rating
-40 to +150
-65 to +150
Unit
°C
°C
Operation above the absolute maximum rating may cause device failure.
Operation at the absolute maximum ratings, for extended periods, may reduce device reliability.
Unless otherwise stated voltages specified are relative to the ANODE pin.
These are stress ratings only. Operation outside the absolute maximum ratings may cause device failure.
Recommended Operating Conditions
(@T
A
= +25°C, unless otherwise specified.)
Symbol
V
KA
I
KA
T
A
Cathode Voltage
Cathode Current
Operating Ambient Temperature Range
Parameter
Min
V
REF
0.1
-40
Max
18
15
+125
Units
V
mA
°C
Package Thermal Data
Package
SOT23
SOT25
SC70-6 (SOT363)
θ
JA
380°C/W
250°C/W
380°C/W
P
DIS
T
A
= +25°C, T
J
= +150°C
330mW
500mW
330mW
TLV431
Document number: DS32088 Rev. 7 - 2
2 of 15
www.diodes.com
© Diodes Incorporated
September 2019
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