TL431CDBZR,215 - NEXPERIA

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1. Product profile

1.1 General description

Three-terminal shu nt regulator fa mily with an output vo lt age range b etween V ref and 36 V,

to be set by two external resistors.

•The TL431xDBZR types feature an enhanced stability area with a very low

load capacity require ment.

•The TL431xFDT types offer an enhanced stability area and a higher

ElectroMagnetic Interference (EMI) ruggedn ess, for example, for Switch Mode Power

Supply (SMPS) applications.

•The TL431xSDT types are designed for standard requirements and linear

applications.

TL431 family

Adjustable precision shunt regulator

Rev. 5 — 01 September 2015 Product data sheet

SOT23

Table 1. Product overview

Reference

volt age

tolerance (Vref)

Temperature range (Tamb)Pinning

configuration

(see Table 3)

0C to 70 C40 C to 85 C40 C to 125 C

2 % TL431CDBZR TL431IDBZR TL431QDBZR normal pinning

TL431FDT normal pinning

TL431MFDT mirrored pinning

TL431SDT normal pinning

TL431MSDT mirrored pinning

1 % TL431ACDBZR TL431AIDBZR TL431AQDBZR normal pinning

TL431AFDT normal pinning

TL431AMFDT mirrored pinning

TL431ASDT normal pinning

TL431AMSDT mirrored pinning

0.5 % TL431BCDBZR TL431BIDBZR TL431BQDBZR normal pinning

TL431BFDT normal pinning

TL431BMFDT mirrored pinning

TL431BSDT normal pinning

TL431BMSDT mirrored pinning

Product data sheet Rev. 5 — 01 September 2015 2 of 27

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

1.2 Features and benefits

Programmable output voltage up to 36 V

Three different reference voltage tolerances:

Standard grade: 2 %

A-Grade: 1 %

B-Grade: 0.5 %

Typical temperature drift: 6 mV (in a range of 0 C up to 70 C)

Low output nois e

Typical output impedance: 0.2 

Sink current capability: 1 mA to 100 mA

AEC-Q100 qualified (grade 1)

1.3 Applications

Shunt regulator

Precision current limiter

Precision constant current sink

Isolated feedback loop for Switch Mode Power Supply (SMPS)

1.4 Quick reference data

Table 2. Quick reference data

Symbol Parameter Conditions Min Typ Max Unit

VKA cathode-anode voltage Vref -36V

IKcathode current 1 - 100 mA

Vref reference voltage VKA =V

ref;

IK=10mA;

Tamb =25C

Standard-Grade (2 %) 2440 2495 2550 mV

A-Grade (1 %) 2470 2495 2520 mV

B-Grade (0.5 %) 2483 2495 2507 mV

Product data sheet Rev. 5 — 01 September 2015 3 of 27

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

2. Pinning information

Table 3. Pinning

Pin Symbol Description Simplified outline Graphic symbol

Normal pinning: All types wit ho ut MFDT and MSDT ending

1 k cathode

2 REF reference

3 a anode

Mirrored pinning: All types with MFDT an d MSDT ending

1 REF reference

2 k cathode

3 a anode

006aab355

REF

006aab355

REF

Product data sheet Rev. 5 — 01 September 2015 4 of 27

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

3. Ordering information

Table 4. Ordering info rmation

Type number Package

Name Description Version

TL431CDBZR - plastic surface-mounted package; 3 leads SOT23

TL431IDBZR

TL431QDBZR

TL431FDT

TL431MFDT

TL431SDT

TL431MSDT

TL431ACDBZR

TL431AIDBZR

TL431AQDBZR

TL431AFDT

TL431AMFDT

TL431ASDT

TL431AMSDT

TL431BCDBZR

TL431BIDBZR

TL431BQDBZR

TL431BFDT

TL431BMFDT

TL431BSDT

TL431BMSDT

Product data sheet Rev. 5 — 01 September 2015 5 of 27

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

4. Marking

[1] * = placeholder for manufacturing site code.

5. Functional diagram

The TL431 family comprises a range of 3-terminal adjustable shunt regulators, with

specified thermal stability over applicable automotive and commercial temperature

ranges. The output voltage may be set to any value between Vref (approximately 2.5 V)

and 36 V with two external resistors (see Figure 8). These devices have a typical output

impedance of 0.2 . Active output circ u itry pro vid es a ve ry sh ar p tur n -o n ch ar ac ter i st ic ,

making these devices excellent replacements fo r Zener diodes in many applications like

on-board regulation, adjustable power supplies and switching power supplies.

Table 5. Marking codes

Type number Marking code[1] Type number Marking co de[1]

TL431CDBZR CA* TL431ASDT RL*

TL431IDBZR CB* TL431AMSDT LQ*

TL431QDBZR CC* TL431BCDBZR CG*

TL431FDT AR* TL431BIDBZR CH*

TL431MFDT AU* TL431BQDBZR CJ*

TL431SDT RM* TL431BFDT AT*

TL431MSDT LR* TL431BMFDT AW*

TL431ACDBZR CD* TL431BSDT MA*

TL431AIDBZR CE* TL431BMSDT MB*

TL431AQDBZR CF* - -

TL431AFDT AS* - -

TL431AMFDT AV* - -

Fig 1. Functional diagram

Vref

ANODE

CATHODE

REF

006aab569

Product data sheet Rev. 5 — 01 September 2015 6 of 27

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

6. Limiting values

[1] Device mounted on an FR4 Printed-Circuit Board (PCB), single-sided copper, tin-plated and standard

footprint.

[2] Device mounted on an FR4 PCB, single-sided copper, tin-plated, mounting pad for anode 1 cm2.

[3] Device mounted on a ceramic PCB, Al2O3, standard footprint.

Table 6. Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134).

Symbol Parameter Conditions Min Max Unit

VKA cathode-anode voltage - 37 V

IKcathode current 100 150 mA

Iref reference current 0.05 10 mA

Ptot total power dissipation Tamb 25 C[1] -350mW

[2] -580mW

[3] -950mW

Tjjunction temperature - 150 C

Tamb ambient temperature

TL431XCDBZR 0 +70 C

TL431XIDBZR 40 +85 C

TL431XQDBZR

TL431XFDT

TL431XSDT

40 +125 C

Tstg storage temperature 65 +150 C

(1) Ceramic PCB, Al2O3, standard footprint

(2) FR4 PCB, mounting pad for anode 1 cm2

(3) FR4 PCB, standard footprint

Fig 2. Power derating curves

Tamb (°C)

−75 17512525 75−25

006aab570

500

750

250

1000

1250

Ptot

(mW)

(1)

(2)

(3)

Product data sheet Rev. 5 — 01 September 2015 7 of 27

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

7. Recommended operating conditions

8. Thermal characteristics

[1] Device mounted on an FR4 PCB, single- si ded copper, tin-plated and standard footprint.

[2] Device mounted on an FR4 PCB, single-sided copper, tin-plated, mounting pad for anode 1 cm2.

[3] Device mounted on a ceramic PCB, Al2O3, standard footprint.

[4] Soldering point of anode.

Table 7. ESD maximum ratings

Tamb =25



C unless otherwise specified.

Symbol Parameter Conditions Min Max Unit

VESD electrostatic discharge voltage MIL-STD-883

(human body model) -4kV

Table 8. Operating conditio ns

Symbol Parameter Conditions Min Max Unit

VKA cathode-anode voltage Vref 36 V

IKcathode current 1 100 mA

Table 9. Thermal characteris tics

Symbol Parameter Conditions Min Typ Max Unit

Rth(j-a) thermal resistance from

junction to ambient in free air [1] --360K/W

[2] --216K/W

[3] --132K/W

Rth(j-sp) thermal resistance from

junction to solder point [4] --50K/W

Product data sheet Rev. 5 — 01 September 2015 8 of 27

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

9. Characteristics

Table 10. Chara cteristics

Tamb =25



C unless otherwise specified.

Symbol Parameter Conditions Min Typ Max Unit

Standard-Grade (2 %):

TL431CDBZR; TL431IDBZR; TL431QDBZR; TL431FD T; TL43 1MFDT; TL431SDT; TL431MSDT

Vref reference voltage VKA =V

ref; IK= 10 mA 2440 2495 2550 mV

Vref reference voltage variation VKA =V

ref; IK=10mA

TL431CDBZR Tamb =0Cto70C-616mV

TL431IDBZR Tamb =40 Cto85C - 14 34 mV

TL431QDBZR

TL431FDT

TL431MFDT

TL431SDT

TL431MSDT

Tamb =40 C to 125 C

Vref/VKA reference voltage variation

to cathode-anode voltage

variation ratio

IK=10mA

VKA =10VtoV

ref -1.4 2.7 mV/V

VKA =36Vto10V - 12mV/V

Iref reference current IK=10mA;

R1 = 10 k; R2 = open -24A

Iref reference current variation IK=10mA;

R1 = 10 k; R2 = open

TL431CDBZR Tamb =0Cto70C-0.41.2A

TL431IDBZR Tamb =40 Cto85C- 0.82.5A

TL431QDBZR

TL431FDT

TL431MFDT

TL431SDT

TL431MSDT

Tamb =40 C to 125 C

IK(min) minimum cathode current VKA =V

ref -0.41mA

Ioff off-state current VKA =36V; V

ref =0 - 0.1 1 A

ZKA dynamic cathode-anode

impedance IK=1mAto100mA;

VKA =V

ref; f < 1 kHz -0.20.5

A-Grade(1%):

TL431ACDBZR; TL431AIDBZR; TL431AQDBZR; TL431AFDT; TL431AMFDT; TL431ASDT; TL431AMSDT

Vref reference voltage VKA =V

ref; IK= 10 mA 2470 2495 2520 mV

Vref reference voltage variation VKA =V

ref; IK=10mA

TL431ACDBZR Tamb =0Cto70C-616mV

TL431AIDBZR Tamb =40 Cto85C - 14 34 mV

TL431AQDBZR

TL431AFDT

TL431AMFDT

TL431ASDT

TL431AMSDT

Tamb =40 C to 125 C

Vref/VKA reference voltage variation

to cathode-anode voltage

variation ratio

IK=10mA

VKA =10VtoV

ref -1.4 2.7 mV/V

VKA =36Vto10V - 12mV/V

Product data sheet Rev. 5 — 01 September 2015 9 of 27

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

Iref reference current IK=10mA;

R1 = 10 k; R2 = open -24A

Iref reference current variation IK=10mA;

R1 = 10 k; R2 = open

TL431ACDBZR Tamb =0Cto70C-0.41.2A

TL431AIDBZR Tamb =40 Cto85C- 0.82.5A

TL431AQDBZR

TL431AFDT

TL431AMFDT

TL431ASDT

TL431AMSDT

Tamb =40 C to 125 C

IK(min) minimum cathode current VKA =V

ref

TL431ACDBZR Tamb =0Cto70C-0.40.6mA

TL431AIDBZR Tamb =40 Cto85C

TL431AQDBZR

TL431AFDT

TL431AMFDT

TL431ASDT

TL431AMSDT

Tamb =40 C to 125 C

Ioff off-state current VKA =36V; V

ref =0 - 0.1 0.5 A

ZKA dynamic cathode-anode

impedance IK=1mAto100mA;

VKA =V

ref; f < 1 kHz -0.20.5

B-Grade(0.5%):

TL431BCDBZR; TL431BIDBZR; TL431BQDBZR; TL431BFDT; TL431BMFDT; TL431BSDT; TL431BMSDT

Vref reference voltage VKA =V

ref; IK= 10 mA 2483 2495 2507 mV

Vref reference voltage variation VKA =V

ref; IK=10mA

TL431BCDBZR Tamb =0Cto70C-616mV

TL431BIDBZR Tamb =40 Cto85C - 14 34 mV

TL431BQDBZR

TL431BFDT

TL431BMFDT

TL431BSDT

TL431BMSDT

Tamb =40 C to 125 C

Vref/VKA reference voltage variation

to cathode-anode voltage

variation ratio

IK=10mA

VKA =10VtoV

ref -1.4 2.7 mV/V

VKA =36Vto10V - 12mV/V

Iref reference current IK=10mA;

R1 = 10 k; R2 = open -24A

Table 10. Chara cteristics …continued

Tamb =25



C unless otherwise specified.

Symbol Parameter Conditions Min Typ Max Unit

Product data sheet Rev. 5 — 01 September 2015 10 of 27

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

Iref reference current variation IK=10mA;

R1 = 10 k; R2 = open

TL431BCDBZR Tamb =0Cto70C-0.41.2A

TL431BIDBZR Tamb =40 Cto85C- 0.82.5A

TL431BQDBZR

TL431BFDT

TL431BMFDT

TL431BSDT

TL431BMSDT

Tamb =40 C to 125 C

IK(min) minimum cathode current VKA =V

ref

TL431BCDBZR Tamb =0Cto70C-0.40.6mA

TL431BIDBZR Tamb =40 Cto85C

TL431BQDBZR

TL431BFDT

TL431BMFDT

TL431BSDT

TL431BMSDT

Tamb =40 C to 125 C

Ioff off-state current VKA =36V; V

ref =0 - 0.1 0.5 A

ZKA dynamic cathode-anode

impedance IK=1mAto100mA;

VKA =V

ref; f < 1 kHz -0.20.5

Table 10. Chara cteristics …continued

Tamb =25



C unless otherwise specified.

Symbol Parameter Conditions Min Typ Max Unit

Product data sheet Rev. 5 — 01 September 2015 11 of 27

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

IK=10mA; V

KA =V

ref VKA =V

ref; Tamb =25C

Fig 3. Reference voltage as a function of ambient

temperature; typical values Fig 4. Cathode current as a function of

cathode-an ode voltage; typical values

IK=10mA; V

KA =V

ref

Fig 5. Test circuit to Figure 3 and Figure 4

Tamb (°C)

−75 12575−25 25

006aab571

2.48

2.52

2.44

2.56

2.60

Vref

(V)

2.40

VKA (V)

−23201−1

006aab572

−50

100

150

(mA)

−100

006aab573

GND

Vref

VKA

INPUT

Product data sheet Rev. 5 — 01 September 2015 12 of 27

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

IK=10mA; R1=10k; R2 = open IK=10mA; T

amb =25C

Fig 6. Re ference current as a function of ambient

temperature; typical values Fig 7. Reference voltage variation as a function of

cathode-an ode voltage; typical values

Fig 8. Test circuit to Figure 6 and Figure 7

Tamb (°C)

−75 12575−25 25

006aab574

2.0

3.0

1.0

4.0

5.0

Iref

(μA)

0.0

VKA (V)

0403010 20

006aab575

−40

−20

ΔVref

(mV)

−60

006aab576

GND

Vref

VKA

INPUT

Iref

VKA Vref 1R1

-------





Iref R1+=

Product data sheet Rev. 5 — 01 September 2015 13 of 27

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

VKA =36V; V

ref =0V

Fig 9. Off-state current as a function of ambient temperature; typical values

VKA =36V; V

ref =0V

Fig 10. Off-state current as a function of ambient temperature; test circuit

Tamb (°C)

−75 12575−25 25

006aab577

100

150

200

250

Ioff

(nA)

006aab578

GND

VKA

INPUT

Ioff

Product data sheet Rev. 5 — 01 September 2015 14 of 27

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

Tamb =25C

(1) Input

(2) Output

Tamb =25C

(1) Input

(2) Output

Fig 11. All types except TL431XFDT and TL431XSDT:

Input voltage and output voltage as a function

of time; typical values

Fig 12. TL431XFDT:

Input voltage and output v oltage as a function

of time; typical values

Tamb =25C

(1) Input

(2) Output

Tamb =25C

Fig 13. TL4 31 XSDT:

Input voltage and output voltage as a function

of time; typical values

Fig 14. Test circuit to Figure 11, Figure 12 and

Figure 13

t (μs)

−17513

006aab579

Vin; Vout

(V)

(1)

(2)

t (μs)

−17513

006aac478

Vin; Vout

(V)

(1)

(2)

t (μs)

−17513

006aab580

Vin; Vout

(V)

(1)

(2)

006aab581

GND

VKA

220 Ω

50 Ω

PULSE

GENERATOR

f = 100 kHz

Product data sheet Rev. 5 — 01 September 2015 15 of 27

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

IK=10mA; T

amb =25CI

K=10mA; T

amb =25C

Fig 15. All types except TL431XFDT and TL431XSDT:

Voltage amplification as a function of

frequency; typical values

Fig 16. TL431XFDT:

Voltage amplification as a function of

frequency; typical values

IK=10mA; T

amb =25CI

K=10mA; T

amb =25C

Fig 17. TL4 31 XSDT:

Voltage amplification as a function of

frequency; typical values

Fig 18. Test circuit to Figure 15, Figure 16 and

Figure 17

006aab583

(dB)

f (kHz)

110

103

10 102

006aac479

(dB)

f (kHz)

110

103

10 102

006aab582

(dB)

f (kHz)

110

103

10 102

aaa-017869

GND

VKA

IK232 Ω15 kΩ

8.25 kΩ

9 μF

Product data sheet Rev. 5 — 01 September 2015 16 of 27

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

IK=10mA; T

amb =25CI

K=10mA; T

amb =25C

Fig 19. All types except TL431XFDT and TL431XSDT:

Dynamic cathode-anode impedance as a

function of freq uency; typical values

Fig 20. TL431XFDT:

Dynamic cathode-anode impedance as a

function of frequency; typical values

IK=10mA; T

amb =25CI

K=10mA; T

amb =25C

Fig 21. TL4 31 XSDT:

Dynamic cathode-anode impedance as a

function of freq uency; typical values

Fig 22. Test circuit to Figure 19, Figure 20 and

Figure 21

006aab585

102

ZKA

(Ω)

10−1

f (kHz)

110

103

10 102

006aac480

102

ZKA

(Ω)

10−1

f (kHz)

110

103

10 102

006aab586

102

ZKA

(Ω)

10−1

f (kHz)

110

103

10 102

006aab587

GND

50 Ω

1 kΩ

Product data sheet Rev. 5 — 01 September 2015 17 of 27

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

Tamb =25C

(1) VKA =V

ref

VKA = 5 V: no oscillation

VKA = 10 V: no oscillation

VKA = 15 V: no oscillation

Fig 23. All types except TL431XFDT and TL431XSDT:

Cathode current as a function of load capacitance; typical values

VKA =V

ref

Tamb =25CVKA > 5 V: stable operation

Tamb =25C

Fig 24. Test circuit (1) to Figure 23 Fig 25. Test circuit (2) to Figure 23

006aab588

100

(mA)

(nF)

1 10

10 10

Stable Oscillation Stable

(1) (1)

006aab589

GND

150 Ω

VBATT

006aab590

GND

IK150 Ω

VBATT

R1 = 10 kΩ

Product data sheet Rev. 5 — 01 September 2015 18 of 27

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

Tamb =25C

(1) VKA =V

ref

VKA = 5 V: no oscillation

VKA = 10 V: no oscillation

VKA = 15 V: no oscillation

Fig 26. TL431XFDT: Ca thode current as a functio n of load capacitance; ty pical valu es

VKA =V

ref

Tamb =25CVKA > 5 V: stable operation

Tamb =25C

Fig 27. Test circuit (1) to Figure 26 Fig 28. Test circuit (2) to Figure 26

006aac481

100

(mA)

−1

(nF)

110

Stable Oscillation Stable

(1) (1)

006aab589

GND

150 Ω

VBATT

006aab590

GND

IK150 Ω

VBATT

R1 = 10 kΩ

Product data sheet Rev. 5 — 01 September 2015 19 of 27

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

Tamb =25C

(1) VKA =V

ref

(2) VKA =5V

VKA = 10 V: no oscillation

VKA = 15 V: no oscillation

Fig 29. TL431XSDT: Cathode current as a function of load capacitance; typical values

VKA =V

ref

Tamb =25CVKA =5V

VKA > 10 V: stable operation

Tamb =25C

Fig 30. Test circuit (1) to Figure 29 Fig 31. Test circuit (2) to Figure 29

006aab591

100

(mA)

−1

(nF)

110

Stable Oscillation Stable

(2) (2)

(1) (1)

006aab589

GND

150 Ω

VBATT

006aab590

GND

IK150 Ω

VBATT

R1 = 10 kΩ

Product data sheet Rev. 5 — 01 September 2015 20 of 27

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

10. Application information

Fig 32. Shunt regul a tor

Fig 33. Series pass regulator

Fig 34. Single-supply comp arator with temperature-compensated threshold

006aab592

OUT

V+

VOUT 1R1

-------





Vref

=

006aab593

VOUT

V+

VOUT 1R1

-------





Vref

=

VOUT min Vref Vbe

006aab594

VOUT

V+

VIN

Vth Vref

VIN Vref VOUT 0

VIN Vref VOUT 2V

Product data sheet Rev. 5 — 01 September 2015 21 of 27

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

Fig 35. Constant current source

Fig 36. High-c u rre nt sh un t regu la tor

Fig 37. Constant current sink

006aab595

OUT

RCL

V+

IOUT Vref

RCL

---------

006aab596

VOUT

V+

VOUT 1R1

-------





Vref

=

006aab597

ISINK

V+

ISINK Vref

---------

Product data sheet Rev. 5 — 01 September 2015 22 of 27

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

11. Test information

11.1 Quality information

This product has been qualified in accordance with the Automotive Electronics Council

(AEC) standard Q100 - Failure mechanism based stress test qualification for integrated

circuits, and is suitable for use in automotive applications.

12. Package outline

Fig 38. TL4 31 in co ntrol loop of SMPS

006aac482

VOUT

GND

REF

GND

REGULATOR LINE

Fig 39. Package outline SOT23 (TO-236AB)

04-11-04Dimensions in mm

0.45

0.15

1.9

1.1

0.9

3.0

2.8

2.5

2.1 1.4

1.2

0.48

0.38 0.15

0.09

Product data sheet Rev. 5 — 01 September 2015 23 of 27

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

13. Soldering

Fig 40. Reflow soldering footprint SOT23 (TO-236AB)

Fig 41. Wave soldering footprint SOT23 (TO-236AB)

solder lands

solder resist

occupied area

solder paste

sot023_fr

0.5

(3×)

0.6

(3×)

0.6

(3×)

0.7

(3×)

3.3

2.9

1.7

1.9

Dimensions in mm

solder lands

solder resist

occupied area

preferred transport direction during soldering

sot023_fw

2.8

4.5

1.4

4.6

1.4

(2×)

1.2

(2×)

2.2

2.6

Dimensions in mm

Product data sheet Rev. 5 — 01 September 2015 24 of 27

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

14. Revision history

Table 11. Revision history

Document ID Release date Data sheet status Change notice Supersedes

TL431_FAM v.5 20150901 Product data sheet - TL431_FAM v.4

Modifications: •Figure 18: Capacitor value corrected

TL431_FAM v.4 20110630 Product data sheet - TL431_FAM v.3

TL431_FAM v.3 20101105 Product data sheet - TL431_FAM v.2

TL431_FAM v.2 20100120 Product data sheet - TL431_FAM v.1

TL431_FAM v.1 20090806 Product data sheet - -

Product data sheet Rev. 5 — 01 September 2015 25 of 27

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

15. Legal information

15.1 Data sheet status

[1] Please consult the most recently issued document before initiating or completing a design.

[2] The term ‘short data sheet’ is explained in section “Definitions”.

[3] The product status of de vice(s) descr ibed in th is document m ay have cha nged since thi s document w as publish ed and may di ffe r in case of multiple devices. The latest product status

information is available on the Internet at URL http://www.nxp.com.

15.2 Definitions

Draft — The document is a draft version only. The content is still under

internal review and subject to formal approval, which may result in

modifications or additions. NXP Semiconductors does not give any

representations or warranties as to the accuracy or completeness of

information included herein and shall have no liab ility for the consequences of

use of such information.

Short data sheet — A short data sheet is an extract from a full data sheet

with the same product type number(s) and tit le. A short data sh eet is intended

for quick reference only and shou ld not b e relied u pon to cont ain det ailed and

full information. For detailed and full informatio n see the relevant full dat a

sheet, which is available on request via the local NXP Semicond uctors sales

office. In case of any inconsistency or conflict with the short data sheet, the

full data sheet shall pre va il.

Product specificat io n — The information and data provided in a Product

data sheet shall define the specification of the product as agreed between

NXP Semiconductors and its customer, unless NXP Semiconductors and

customer have explicitly agreed otherwise in writing. In no event however,

shall an agreement be valid in which the NXP Semiconductors product is

deemed to off er functions and qualities beyon d those described in the

Product data sheet.

15.3 Disclaimers

Limited warr a nty and liability — Information in this document is believed to

be accurate and reliable. However, NXP Semiconductors does not give any

representations or warrant ies, expressed or implied, as to the accuracy or

completeness of such information and shall have no liability for the

consequences of use of such information. NXP Se miconductors takes no

responsibility for the content in this document if provided by an information

source outside of NXP Semiconductors.

In no event shall NXP Semiconductors be liable for any indirect , incidental,

punitive, special or consequ ential damages (including - wit hout limitation - lost

profits, lost savings, business interruption, costs related to the removal or

replacement of any products or rework charges) whether or not such

damages are based on tort (including negligence), warranty, breach of

contract or any other legal theory.

Notwithstanding any damages that customer might incur for any reason

whatsoever, NXP Semiconductors’ ag gregate and cumulative l iability towards

customer for the products described herein shall be limited in accordance

with the Terms and conditions of commercial sale of NXP Semiconductors.

Right to make changes — NXP Semiconductors reserves the right to make

changes to information published in this document, including without

limitation specifications and product descriptions, at any time and without

notice. This document supersedes and replaces all informa tion supplied prior

to the publication hereof .

Suitability for use in automotive applications — This NXP

Semiconductors product has been qualified for use in automotive

applications. Unless otherwise agreed in writing, t he product is not designed,

authorized or warranted to be suitable for use in life support, life-critical or

safety-critical systems or equipment, nor in applications where failure or

malfunction of an NXP Semiconductors product can reasonably be expected

to result in perso nal injury, death or severe property or environmental

damage. NXP Semiconductors and its suppliers accept no liability for

inclusion and/or use of NXP Semiconducto rs products in such equipment or

applications and t her efo re su ch inclu si on a nd/or use is at the cu stome r's own

risk.

Applications — Applications that are described herein for any of these

products are for illustrative purposes only. NXP Semiconductors makes no

representation or warranty that such applications will be suitable for the

specified use without further testing or modification.

Customers are responsible for the design and ope ration of their applications

and products using NXP Semiconductors product s, and NXP Semiconductors

accepts no liability for any assistance with applications or customer product

design. It is customer’s sole responsibility to determine whether the NXP

Semiconductors product is suit able and fit for t he customer’s applications and

products planned, as well as fo r the planned application and use of

customer’s third party customer(s). Custo mers should provide appropriate

design and operating safeguards to minimize the risks associated with their

applications and products.

NXP Semiconductors does not accept any liability related to any default,

damage, costs or problem which is based on any weakness or default in the

customer’s applications or products, or the application or use by customer’s

third party custo mer(s). Customer is responsible for doing all necessary

testing for the customer’s applications and pro ducts using NXP

Semiconductors products in order to avoid a default of the applications and

the products or of the application or use by cust omer’s third party

customer(s). NXP does not accept any liability in this respect.

Limiting values — Stress above one or more limiting values (as defined in

the Absolute Maximum Ratings System of IEC 60134) will cause permanent

damage to the device. Limiting values are stress ratings only and (proper)

operation of the device at these or any other conditions above those given in

the Recommended operating conditions section (if present) or the

Characteristics sections of this document is not warranted. Constant or

repeated exposure to limiting values will permanently and irreversibly affect

the quality and reliability of the device.

Terms and conditions of commercial sale — NXP Semiconductors

products are sold subject to the general terms and conditions of commercial

sale, as published at http://www.nxp.com/profile/terms, unless otherwise

agreed in a valid written individua l agreement. In case an individual

agreement is concluded only the terms and conditions of the respective

agreement shall apply. NXP Semiconductors hereby expressly objects to

applying the customer’s general terms and conditions with regard to the

purchase of NXP Semiconductors products by customer.

Document status[1][2] Product status[3] Definition

Objective [short] data sheet Development This document contain s data from the objective specification for product development .

Preliminary [short] dat a sheet Qualification This document contains data from the preliminary specificat ion.

Product [short] data sheet Production This document contains the product specification.

Product data sheet Rev. 5 — 01 September 2015 26 of 27

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

No offer to sell or license — Nothing in this document may be interpret ed or

construed as an of fer to se ll product s that is op en for accept ance or the grant ,

conveyance or implication of any license under any copyrights, patents or

other industrial or intellectual property rights.

Export control — This document as well as the item(s) described herein

may be subject to export control regulations. Export might require a prior

authorization from competent authorities.

Quick reference data — The Quick reference data is an extract of the

product data given in the Limiting values and Characteristics sections of this

document, and as such is not complete, exhaustive or legally binding.

Translations — A non-English (translated) version of a document is for

reference only. The English version shall prevail in case of any discrepancy

between the translated and English versions.

15.4 Trademarks

Notice: All referenced b rands, produc t names, service names and trademarks

are the property of their respective ow ners.

16. Contact information

For more information, please visit: http://www.nxp.com

For sales office addresses, please send an email to: salesaddresses@nxp.com

NXP Semiconductors TL431 family

Adjustable precision shunt regulator

For more information, please visit: http://www.nxp.com

For sales office addresses, please send an email to: salesaddresses@nxp.com

Date of release: 01 September 2015

Document identifier: TL431 family

Please be aware that important notices concerning this document and the product(s)

described herein, have been included in section ‘Legal information’.

17. Contents

1 Product profile . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.1 General description . . . . . . . . . . . . . . . . . . . . . 1

1.2 Features and benefits. . . . . . . . . . . . . . . . . . . . 2

1.3 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.4 Quick reference data . . . . . . . . . . . . . . . . . . . . 2

2 Pinning information. . . . . . . . . . . . . . . . . . . . . . 3

3 Ordering information. . . . . . . . . . . . . . . . . . . . . 4

4 Marking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

5 Functional diagram . . . . . . . . . . . . . . . . . . . . . . 5

6 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 6

7 Recommended operating conditions. . . . . . . . 7

8 Thermal characteristics . . . . . . . . . . . . . . . . . . 7

9 Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . 8

10 Application information. . . . . . . . . . . . . . . . . . 20

11 Test information. . . . . . . . . . . . . . . . . . . . . . . . 22

11.1 Quality information . . . . . . . . . . . . . . . . . . . . . 22

12 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 22

13 Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

14 Revision history. . . . . . . . . . . . . . . . . . . . . . . . 24

15 Legal information. . . . . . . . . . . . . . . . . . . . . . . 25

15.1 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 25

15.2 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

15.3 Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 25

15.4 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 26

16 Contact information. . . . . . . . . . . . . . . . . . . . . 26

17 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27