TL431ACD - FAIRCHILD SEMICONDUCTOR

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of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. ON Semiconductor reserves the right

to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability

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Semiconductor products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON

Semiconductor data sheets and/or speciﬁcations can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s

technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA

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of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor

is an Equal Opportunity/Afﬁrmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.

www.fairchildsemi.com

Rev. 1.0.4

Features

• Programmable Output Voltage to 36 Volts

• Low Dynamic Outpu t Impedance 0.2Ω Typical

• Sink Current Capability of 1.0 to 100mA

• Equivalent Full-Range Temperature Coefficient of

50ppm/°C Typical

• Temperature Compensated For Operation Over Full Rated

Operating Temperature Range

• Low Output Noise Voltage

• Fast Turn-on Response

Description

The TL431/TL431A are three-terminal adjustable regulator

series with a guaranteed thermal stability over applicable

temperature ranges. The output voltage may be set to any

value between VREF (appro ximately 2.5 volts) and 36 volts

with two external resistors These devices have a typical

dynamic output impedance of 0.2Ω. Active output circuitry

provides a very sharp turn-on characteristic, making these

devices excel lent replacement for zener diodes in many

applications.

TO-92

8-DIP

8-SOP

1. Ref 2. Anode 3. Cathode

1. Cathode 2. 3. 6. 7. Anode

8. Ref 4. 5. NC

1.Cathode 2.3.4.5.7.NC

6.Anode 8.Ref

TL431/TL431A

Programmable Shunt Regulator

TL431/TL431A

Internal Block Diagram

Absolute Maximum Ratings

(Operating temperature range applies unless otherwise specified.)

Recommended Operating Conditions

Parameter Symbol Value Unit

Cathode Volt ag e VKA 37 V

Cathode Current Range (Continuous) IKA -100 ~ +150 mA

Reference Input Current Range IREF -0.05 ~ +10 mA

Power Dissipation

D, LP Suffix Package

P Suffix Package PD770

1000 mW

Operating Temperature Range TOPR -25 ~ +85 °C

Junction Temperature TJ150 °C

Storage Temperature Range TSTG -65 ~ +150 °C

Parameter Symbol Min Typ Max Unit

Cathode Volt ag e VKA VREF -36V

Cathode Curr en t IKA 1.0 - 100 mA

TL431/TL431A

Electrical Characteristics

(TA = +25°C, unless otherwise specified)

•T

MIN= -25 °C, TMAX= +85 °C

Parameter Symbol Conditions TL431 TL431A Unit

Min. Typ. Max. Min. Typ. Max.

Reference Input Voltage VREF VKA=VREF, IKA=10mA 2.440 2.495 2.550 2.470 2.495 2.520 V

Deviation of Reference

Input Voltage Over-

Temperature (Note 1)

ΔVREF/

ΔTVKA=VREF, IKA=10mA

TMIN≤TA≤TMAX -4.517 -4.517mV

Ratio of Change in

Reference Input Voltage

to the Change in

Cathode Voltage

ΔVREF/

ΔVKA IKA

=10mA

ΔVKA=10V-

VREF - - 1.0 -2.7 - -1.0 -2.7 mV/V

ΔVKA=36V-

10V - -0.5 -2.0 - -0.5 -2.0

Reference Input Current IREF IKA=10mA,

R1=10KΩ,R2=∞-1.54 -1.54μA

Deviation of Reference

Input Current Over Full

Temperature Range ΔIREF/ΔTIKA=10mA,

R1=10KΩ,R2=∞

TA =Full Range - 0.4 1.2 - 0.4 1.2 μA

Minimum Cathode Cur-

rent for Regulation IKA(MIN) VKA=VREF - 0.45 1.0 - 0.45 1.0 mA

Off - Stage Cathode

Current IKA(OFF) VKA=36V, VREF=0 - 0.05 1.0 - 0.05 1.0 μA

Dynamic Impedance

(Note 2) ZKA VKA=VREF,

IKA=1 to 100mA

f ≥1.0KHz - 0.15 0.5 - 0.15 0.5 Ω

TL431/TL431A

Test Circuits

Figure 1. Test Circuit for VKA=VREF Figure 2. Test Circuit for VKA≥VREF

TL431/A TL431/A

TL431/A

Figure 3. Test Circuit for lKA(OFF)

TL431/TL431A

Typical Perfomance Characteristics

Figure 1. Cathode Current vs. Cathode Volta ge

Figure 3. Change In Reference Inpu t Voltage vs.

Cathode Voltage

Figure 5. Small Signal Voltage Amplification vs. Frequency

Figure 2. Cathode Current vs. Cath ode Voltage

Figure 4. Dyna mi c Impedance Frequency

Figure 6. Pulse Response

TL431/TL431A

Typical Application

Figure 10. Shunt Regulator Figure 11. Output Control for Three-

Termianl Fi xed Regulator Figure 12. High Current Shunt Regula-

tor

Figure 13. Current Limit or Current Source Figure 14. Constant-Current Sink

VO1R1

-------

⎝⎠

⎛⎞

Vref

TL431/A

VOVref 1R1

-------

⎝⎠

⎛⎞

TL431/A

MC7805/LM7805

VO1R1

-------

⎝⎠

⎛⎞

Vref

TL431/A

TL431/A TL431/A

TL431/TL431A

Mechanical Dimensions

Package

0.46

±0.10

1.27TYP

(R2.29)

3.86MAX

[1.27

±0.20

]1.27TYP

[1.27

±0.20

]

3.60

±0.20

14.47

±0.40

.02

±0.10

(0.25) 4.58

±0.20

4.58

+0.25

–0.15

0.38

+0.1

–0.0

0.38

+0.10

–0.05

TO-92

TL431/TL431A

Mechanical Dimensions (Continued)

Package

6.40 ±0.20

3.30 ±0.30

0.130 ±0.012

3.40 ±0.20

0.134 ±0.008

4#5

0.252 ±0.008

9.20 ±0.20

0.79

2.54

0.100

0.031

(

)

0.46 ±0.10

0.018 ±0.004

0.060 ±0.004

1.524 ±0.10

0.362 ±0.008

9.60

0.378 MAX

5.08

0.200

0.33

0.013

7.62

0~15°

0.300

MAX

MIN

0.25

+0.10

–0.05

0.010

+0.004

–0.002

8-DIP

TL431/TL431A

Mechanical Dimensions (Continued)

Package

4.92 ±0.20

0.194 ±0.008

0.41 ±0.10

0.016 ±0.004

1.27

0.050

5.72

0.225

1.55 ±0.20

0.061 ±0.008

0.1~0.25

0.004~0.001

6.00 ±0.30

0.236 ±0.012

3.95 ±0.20

0.156 ±0.008

0.50 ±0.20

0.020 ±0.008

5.13

0.202 MAX

#4 #5

0~8°

0.56

0.022

()

1.80

0.071

MAX0.10

MAX0.004

MAX

MIN

0.10

-0.05

0.15+

0.004

-0.002

0.006

8-SOP

TL431/TL431A

2/22/11 0.0m 001

Stock#DS400301

LIFE SUPPORT POLICY

FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES

OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR

CORPORATION. As used herein:

1. Life support devices or systems are devices or systems

which, (a) are intended for surgical implant into the body,

or (b) support or sustain life, and (c) whose failure to

perform when properly used in accordance with

instructions for use provided in the labeling, can be

reasonably expected to result in a significant injury of the

user.

2. A critical component in any component of a life support

device or system whose failure to perform can be

reasonably expected to cause the failure of the life support

device or system, or to affect its safety or effectiveness.

www.fairchildsemi.com

DISCLAIMER

FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY

PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY

LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER

DOES IT CONVEY ANY LICENSE UNDER ITS PATEN T RIGHTS, NOR THE RIGHTS OF OTHERS.

Ordering Information

Product Number Output Voltage Tolerance Package Operating Temperature

TL431ACLP 1% TO-92

-25 ~ + 85oC

TL431ACD 8-SOP

TL431CLP 2% TO-92

TL431CP 8-DIP

TL431CD 8-SOP

www.onsemi.com

ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries.

ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent

coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein.

ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability

arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.

Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards,

regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or

specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer

application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not

designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification

in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized

application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and

expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such

claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This

literature is subject to all applicable copyright laws and is not for resale in any manner.

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