+
−
CATHODE
ANODE
REF
Vref
REF
ANODE CATHODE
1
2
3
4
8
7
6
5
CATHODE
NC
NC
NC
REF
NC
ANODE
NC
JG PACKAGE
(TOP VIEW)
NC – No internal connection
TL1431-SP
www.ti.com
SLVSB44B –JULY 2012–REVISED SEPTEMBER 2013
CLASS V, PRECISION PROGRAMMABLE REFERENCE
Check for Samples: TL1431-SP
1FEATURES
• QMLV Qualified to 100k Rad RHA,
SMD 5962R99620
• 0.4% Initial Voltage Tolerance
• 0.2-ΩTypical Output Impedance
• Fast Turnon…500 ns
• Sink Current Capability…1 mA to 100 mA
• Low Reference Current (REF)
• Adjustable Output Voltage…VI(ref) to 36 V
DESCRIPTION/ORDERING INFORMATION
The TL1431 is a precision programmable reference with specified thermal stability over automotive, commercial,
and military temperature ranges. The output voltage can be set to any value between VI(ref) (approximately 2.5 V)
and 36 V with two external resistors. This device has a typical output impedance of 0.2 Ω. Active output circuitry
provides a very sharp turnon characteristic, making the device an excellent replacement for Zener diodes and
other types of references in applications such as onboard regulation, adjustable power supplies, and switching
power supplies.
The TL1431 is characterized for operation over the full military temperature range of –55°C to 125°C.
ORDERING INFORMATION(1)
TAPACKAGE ORDERABLE PART NUMBER TOP-SIDE MARKING
5962-9962001VPA 9962001VPA
CDIP – JG Tube of 50
–55°C to 125°C 5962R9962001VPA R9962001VPA
CFP – U Tube of 25 5962R9962001VHA R9962001VHA
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
SYMBOL
FUNCTIONAL BLOCK DIAGRAM
1Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Copyright © 2012–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
CATHODE
REF
ANODE
800 Ω
2.4 kΩ
4 kΩ
20 pF
1 kΩ
7.2 kΩ
800 Ω
800 Ω
150 Ω
10 kΩ
3.28 kΩ
20 pF
1
8
2, 3, 6, 7
TL1431-SP
SLVSB44B –JULY 2012–REVISED SEPTEMBER 2013
www.ti.com
EQUIVALENT SCHEMATIC
Absolute Maximum Ratings(1)
over operating free-air temperature range (unless otherwise noted) MIN MAX UNIT
VKA Cathode voltage(2) 37 V
IKA Continuous cathode current range –100 150 mA
II(ref) Reference input current range –0.05 10 mA
JG package 14.5
θJC Package thermal impedance(3) (4) °C/W
U package 19.1
TJOperating virtual junction temperature 150 °C
Lead temperature 1,6 mm (1/16 in) from case for 10 s 260 °C
Tstg Storage temperature range –65 150 °C
(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating
conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltage values are with respect to ANODE, unless otherwise noted.
(3) Maximum power dissipation is a function of TJ(max),θJC, and TC. The maximum allowable power dissipation at any allowable case
temperature is PD= (TJ(max) – TC)/θJC. Operating at the absolute maximum TJof 150°C can affect reliability.
(4) The package thermal impedance is calculated in accordance with MIL-STD-883.
Recommended Operating Conditions MIN MAX UNIT
VKA Cathode voltage VI(ref) 36 V
IKA Cathode current 1 100 mA
TAOperating free-air temperature –55 125 °C
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Product Folder Links: TL1431-SP
∆I
∆V
|z'| =
R2
R1
|z |
KA
(
1 +
(
∆IKA
∆VKA
|z | =
KA
where:
∆TAis the rated operating temperature range of the device.
MaxVI(ref)
MinVI(ref)
˙TA
VI(dev)
αVI(ref) ppm
°C
VI(dev)
VI(ref)at 25°C× 106
TA
(
(
=
(
(
∆VKA
∆VI(ref)
(4) The output impedance is defined as:
, which is approximately equal to .
TL1431-SP
www.ti.com
SLVSB44B –JULY 2012–REVISED SEPTEMBER 2013
Electrical Characteristics
at specified free-air temperature, IKA = 10 mA (unless otherwise noted) TEST
PARAMETER TEST CONDITIONS TA(1) MIN TYP MAX UNIT
CIRCUIT
25°C 2475 2500 2540
VI(ref) Reference input voltage VKA = VI(ref) Figure 1 mV
Full 2460 2550
range
Deviation of reference input Full
VI(dev) voltage over full temperature VKA = VI(ref) Figure 1 17 55(3) mV
range
range(2)
Ratio of change in reference Full
input voltage to the change in ΔVKA = 3 V to 36 V Figure 2 –1.1 –2 mV/V
range
cathode voltage 25°C 1.5 2.5
II(ref) Reference input current R1 = 10 kΩ, R2 = ∞Figure 2 μA
Full 5
range
Deviation of reference input Full
II(dev) current over full temperature R1 = 10 kΩ, R2 = ∞Figure 2 0.5 3(3) μA
range
range(2)
Minimum cathode current for
Imin VKA = VI(ref) 25°C Figure 1 0.45 1 mA
regulation 25°C 0.18 0.5
Ioff Off-state cathode current VKA = 36 V, VI(ref) = 0 Figure 3 μA
Full 2
range
VKA = VI(ref), f ≤1 kHz,
|zKA| Output impedance(4) 25°C Figure 1 0.2 0.4 Ω
IKA = 1 mA to 100 mA
(1) Full range is –55°C to 125°C.
(2) The deviation parameters VI(dev) and II(dev) are defined as the differences between the maximum and minimum values obtained over the
rated temperature range. The average full-range temperature coefficient of the reference input voltage αVI(ref) is defined as:
αVI(ref) is positive or negative, depending on whether minimum VI(ref) or maximum VI(ref), respectively, occurs at the lower temperature.
(3) On products compliant to MIL-PRF-38535, this parameter is not production tested.
When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is given by:
Copyright © 2012–2013, Texas Instruments Incorporated Submit Documentation Feedback 3
Product Folder Links: TL1431-SP
Input VKA
Ioff
Input VKA
IKA
VI(ref)
Input VKA
IKA
VI(ref)
II(ref)
R1
R2 VKA +VI(ref) ǒ1)R1
R2Ǔ)II(ref) R1
TL1431-SP
SLVSB44B –JULY 2012–REVISED SEPTEMBER 2013
www.ti.com
PARAMETER MEASUREMENT INFORMATION
Figure 1. Test Circuit for V(KA) = Vref Figure 2. Test Circuit for V(KA) > Vref
Figure 3. Test Circuit for Ioff
4Submit Documentation Feedback Copyright © 2012–2013, Texas Instruments Incorporated
Product Folder Links: TL1431-SP
200
0
− 200 −1 0 1 2 3 4
400
600
CATHODE CURRENT
vs
CATHODE VOLTAGE
800
VKA − Cathode V oltage − V
VKA = VI(ref)
TA = 25°C
−2
− Cathode Current −IKA Aµ
0
− 50
− 100
− 150− 3 − 2 − 1
50
100
CATHODE CURRENT
vs
CATHODE VOLTAGE
150
0 1 2 3
VKA − Cathode V oltage − V
VKA = VI(ref)
TA = 25°C
− Cathode Current − mAIKA
2.5
2.49
2.48
− 50 − 25 025 50
2.51
REFERENCE VOLTAGE
vs
FREE-AIR TEMPERATURE
2.52
75 100 125
VI(ref) = VKA
IKA = 10 mA
TA − Free-Air Temperature − °C
− Reference Voltage − VVI(ref)
REFERENCE CURRENT
vs
FREE-AIR TEMPERATURE
− 50 − 25 0 25 50 75 100 125
0
0.5
1
1.5
2
2.5
TA − Free-Air Temperature − °C
IKA = 10 mA
R1 = 10 kΩ
R2 = ∞
− Reference Current −
II(ref) Aµ
TL1431-SP
www.ti.com
SLVSB44B –JULY 2012–REVISED SEPTEMBER 2013
TYPICAL CHARACTERISTICS
Data at high and low temperatures are applicable only within the recommended operating free-air temperature
ranges of the various devices.
Figure 4. Figure 5.
Figure 6. Figure 7.
Copyright © 2012–2013, Texas Instruments Incorporated Submit Documentation Feedback 5
Product Folder Links: TL1431-SP
180
140
120
10010 100 1 k
220
240
f − Frequency − Hz
EQUIVALENT INPUT-NOISE VOLTAGE
vs
FREQUENCY
260
10 k 100 k
200
160
IO = 10 mA
TA = 25°C
− Equivalent Input-Noise Voltage − nV/ HzVn
−1.15
−1.25
−1.35
−1.45 − 25 0
−1.05
RATIO OF DELTA REFERENCE VOLTAGE TO
DELTA CATHODE VOLTAGE
vs
FREE-AIR TEMPERATURE
25 50 75 100 125
TA − Free-Air Temperature − °C
VKA = 3 V to 36 V
−0.85
−0.95
−50
− mV/V∆VI(ref) /∆VKA
0.15
0.1
0.05
0− 25 0 25 50 75
0.2
0.25
OFF-STATE CATHODE CURRENT
vs
FREE-AIR TEMPERATURE
0.3
100 125
0.35
0.4
TA − Free-Air Temperature − °C
VKA = 36 V
VI(ref) = 0
−50
I − Off-State Cathode Current − Aµ
KA(off)
TL1431-SP
SLVSB44B –JULY 2012–REVISED SEPTEMBER 2013
www.ti.com
TYPICAL CHARACTERISTICS (continued)
Figure 8. Figure 9.
Figure 10.
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Product Folder Links: TL1431-SP
V(BATT) In
Out VO
TL1431
Common
µA7805
R1
R2
V+ǒ1)R1
R2ǓVI(ref)
Min V = VI(ref) + 5 V
V(BATT)
R
30 Ω
TL1431
2N2222
2N2222
0.01 µF4.7 kΩ
R1
0.1%
R2
0.1%
VO
VO+ǒ1)R1
R2ǓVI(ref)
V(BATT)
VO
Input
Von ≈ 2 V
Voff ≈ V(BATT)
TL1431
VIT = 2.5 V
GND
V(BATT) R
R1
0.1%
R2
0.1%
VI(ref)
VO
TL1431
VO+ǒ1)R1
R2ǓVI(ref)
TL1431-SP
www.ti.com
SLVSB44B –JULY 2012–REVISED SEPTEMBER 2013
APPLICATION INFORMATION
A. R should provide cathode current ≥1 mA to the TL1431 at minimum V(BATT).
Figure 16. Shunt Regulator Figure 17. Single-Supply Comparator With
Temperature-Compensated Threshold
A. R should provide cathode current ≥1 mA to the TL1431 at minimum V(BATT).
Figure 18. Precision High-Current Series Regulator Figure 19. Output Control of a Three-Terminal
Fixed Regulator
A. Refer to the stability boundary conditions in Figure 15 to determine allowable values for C.
Copyright © 2012–2013, Texas Instruments Incorporated Submit Documentation Feedback 7
Product Folder Links: TL1431-SP
+
−
TL1431
12 V
6.8 kΩ
5 V +0.5% 10 kΩ
10 kΩ
0.1%
10 kΩ
0.1%
VCC
X
Not
Used TL598
Feedback
V(BATT) VO = 5 V
Rb
TL1431
27.4 kΩ
0.1%
27.4 kΩ
0.1%
LM317
In Out
V(BATT)
8.2 kΩ
TL1431 Adjust 243 Ω
0.1%
243 Ω
0.1%
VO = 5 V, 1.5 A, 0.5%
V(BATT)
TL1431
VO+ǒ1)R1
R2ǓVI(ref)
R1
R2
RVO
V(BATT) VO
TL1431
R1
R2
C
Vtrip +ǒ1)R1
R2ǓVI(ref)
TL1431-SP
SLVSB44B –JULY 2012–REVISED SEPTEMBER 2013
www.ti.com
Figure 20. Higher-Current Shunt Regulator Figure 21. Crowbar
A. Rbshould provide cathode current ≥1 mA to the TL1431.
Figure 22. Precision 5-V, 1.5-A, 0.5% Regulator Figure 23. 5-V Precision Regulator
Figure 24. PWM Converter With 0.5% Reference
A. Select R3 and R4 to provide the desired LED intensity and cathode current ≥1 mA to the TL1431.
8Submit Documentation Feedback Copyright © 2012–2013, Texas Instruments Incorporated
Product Folder Links: TL1431-SP
V(BATT)
R1
RCL 0.1%
TL1431
IO+
VI(ref)
RCL )IKA
IO
R1 +
V(BATT)
ǒIO
hFEǓ)IKA
V(BATT)
TL1431
IO
RS
0.1%
IO+
VI(ref)
RS
TL1431
12 V 680 Ω
2 kΩ
R
Off On C
Delay +R C II12 V
(12 V)*VI(ref)
V(BATT) R3
R4
R1A
R2A
R1B
R2B
TL1431
Low Limit +ǒ1)R1B
R2BǓVI(ref)
High Limit +ǒ1)R1A
R2AǓVI(ref)
LED on When
Low Limit < V(BATT) < High Limit
TL1431
TL1431-SP
www.ti.com
SLVSB44B –JULY 2012–REVISED SEPTEMBER 2013
Figure 25. Voltage Monitor Figure 26. Delay Timer
Figure 27. Precision Current Limiter Figure 28. Precision Constant-Current Sink
Copyright © 2012–2013, Texas Instruments Incorporated Submit Documentation Feedback 9
Product Folder Links: TL1431-SP
PACKAGE OPTION ADDENDUM
www.ti.com 13-Nov-2013
Addendum-Page 1
PACKAGING INFORMATION
Orderable Device Status
(1)
Package Type Package
Drawing Pins Package
Qty Eco Plan
(2)
Lead/Ball Finish
(6)
MSL Peak Temp
(3)
Op Temp (°C) Device Marking
(4/5)
Samples
5962-9962001VPA ACTIVE CDIP JG 8 1 TBD A42 N / A for Pkg Type -55 to 125 9962001VPA
TL1431M
5962R9962001VHA ACTIVE CFP U 10 1 TBD Call TI Call TI -55 to 125 R9962001VHA
TL1431M
5962R9962001VPA ACTIVE CDIP JG 8 1 TBD Call TI Call TI -55 to 125 R9962001VPA
TL1431M
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
(6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish
value exceeds the maximum column width.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
PACKAGE OPTION ADDENDUM
www.ti.com 13-Nov-2013
Addendum-Page 2
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
OTHER QUALIFIED VERSIONS OF TL1431-SP :
•Catalog: TL1431
•Automotive: TL1431-Q1
•Enhanced Product: TL1431-EP
•Military: TL1431M
NOTE: Qualified Version Definitions:
•Catalog - TI's standard catalog product
•Automotive - Q100 devices qualified for high-reliability automotive applications targeting zero defects
•Enhanced Product - Supports Defense, Aerospace and Medical Applications
•Military - QML certified for Military and Defense Applications
MECHANICAL DATA
MCER001A – JANUARY 1995 – REVISED JANUAR Y 1997
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
JG (R-GDIP-T8) CERAMIC DUAL-IN-LINE
0.310 (7,87)
0.290 (7,37)
0.014 (0,36)
0.008 (0,20)
Seating Plane
4040107/C 08/96
5
4
0.065 (1,65)
0.045 (1,14)
8
1
0.020 (0,51) MIN
0.400 (10,16)
0.355 (9,00)
0.015 (0,38)
0.023 (0,58)
0.063 (1,60)
0.015 (0,38)
0.200 (5,08) MAX
0.130 (3,30) MIN
0.245 (6,22)
0.280 (7,11)
0.100 (2,54)
0°–15°
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. This package can be hermetically sealed with a ceramic lid using glass frit.
D. Index point is provided on cap for terminal identification.
E. Falls within MIL STD 1835 GDIP1-T8
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