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Спецификация TL431 изготовлена «ON Semiconductor» и имеет функцию, называемую «PROGRAMMABLE PRECISION REFERENCES».

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Номер произв	TL431
Описание	PROGRAMMABLE PRECISION REFERENCES
Производители	ON Semiconductor
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Programmable

Precision References

The TL431, A, B integrated circuits are three–terminal programmable

shunt regulator diodes. These monolithic IC voltage references operate as a

low temperature coefficient zener which is programmable from Vref to 36 V

with two external resistors. These devices exhibit a wide operating current

range of 1.0 mA to 100 mA with a typical dynamic impedance of 0.22 Ω. The

characteristics of these references make them excellent replacements for

zener diodes in many applications such as digital voltmeters, power

supplies, and op amp circuitry. The 2.5 V reference makes it convenient to

obtain a stable reference from 5.0 V logic supplies, and since the TL431, A,

B operates as a shunt regulator, it can be used as either a positive or

negative voltage reference.

• Programmable Output Voltage to 36 V

• Voltage Reference Tolerance: ±0.4%, Typ @ 25°C (TL431B)

• Low Dynamic Output Impedance, 0.22 Ω Typical

• Sink Current Capability of 1.0 mA to 100 mA

• Equivalent Full–Range Temperature Coefficient of 50 ppm/°C Typical

• Temperature Compensated for Operation over Full Rated Operating

Temperature Range

• Low Output Noise Voltage

TL431, A, B

Series

PROGRAMMABLE

PRECISION REFERENCES

SEMICONDUCTOR

TECHNICAL DATA

LP SUFFIX

PLASTIC PACKAGE

CASE 29

(TO–92)

123

Pin 1. Reference

2. Anode

3. Cathode

P SUFFIX

PLASTIC PACKAGE

CASE 626

DM SUFFIX

PLASTIC PACKAGE

CASE 846A

(Micro–8)

ORDERING INFORMATION

Device

Operating

Temperature Range

TL431CLP, ACLP, BCLP

TL431CP, ACP, BCP

TL431CDM, ACDM, BCDM

TA = 0° to +70°C

TL431CD, ACD, BCD

TL431ILP, AILP, BILP

TL431IP, AIP, BIP

TL431IDM, AIDM, BIDM

TA = –40° to +85°C

TL431ID, AID, BID

MOTOROLA ANALOG IC DEVICE DATA

Package

TO–92

Plastic

Micro–8

SOP–8

TO–92

Plastic

Micro–8

SOP–8

Cathode 1

N/C 2

N/C 3

N/C 4

8 Reference

7 N/C

6 Anode

5 N/C

(Top View)

D SUFFIX

PLASTIC PACKAGE

CASE 751

(SOP–8)

Cathode 1

Anode

N/C 4

8 Reference

Anode

5 N/C

(Top View)

SOP–8 is an internally modified SO–8 package. Pins 2,

3, 6 and 7 are electrically common to the die attach flag.

This internal lead frame modification decreases power

dissipation capability when appropriately mounted on a

printed circuit board. SOP–8 conforms to all external

dimensions of the standard SO–8 package.

Rev 7

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Symbol

Reference

(R)

Cathode

(K)

Anode

(A)

TL431, A, B Series

Representative Schematic Diagram

Component values are nominal

Cathode (K)

Reference

(R)

800 800

20 pF

Representative Block Diagram

Reference

(R)

–

2.5 Vref

Cathode

(K)

3.28 k

4.0 k

20 pF

2.4 k 7.2 k

1.0 k

800

Anode (A)

This device contains 12 active transistors.

Anode (A)

MAXIMUM RATINGS (Full operating ambient temperature range applies, unless

otherwise noted.)

Rating

Symbol

Value

Unit

Cathode to Anode Voltage

Cathode Current Range, Continuous

Reference Input Current Range, Continuous

Operating Junction Temperature

Operating Ambient Temperature Range

TL431I, TL431AI, TL431BI

TL431C, TL431AC, TL431BC

Storage Temperature Range

Total Power Dissipation @ TA = 25°C

Derate above 25°C Ambient Temperature

D, LP Suffix Plastic Package

P Suffix Plastic Package

DM Suffix Plastic Package

Total Power Dissipation @ TC = 25°C

Derate above 25°C Case Temperature

D, LP Suffix Plastic Package

P Suffix Plastic Package

NOTE: ESD data available upon request.

VKA

Iref

Tstg

–100 to +150

–0.05 to +10

150

–40 to +85

0 to +70

–65 to +150

0.70

1.10

0.52

1.5

3.0

°C

150

10 k

RECOMMENDED OPERATING CONDITIONS

Condition

Cathode to Anode Voltage

Cathode Current

Symbol

VKA

Min

Vref

1.0

Max

100

THERMAL CHARACTERISTICS

Characteristic

Thermal Resistance, Junction–to–Ambient

Thermal Resistance, Junction–to–Case

Symbol

RθJA

RθJC

D, LP Suffix

Package

178

P Suffix

Package

114

DM Suffix

Package

240

–

Unit

°C/W

2 MOTOROLA ANALOG IC DEVICE DATA

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TL431, A, B Series

ELECTRICAL CHARACTERISTICS (TA = 25°C, unless otherwise noted.)

TL431I

TL431C

Characteristic

Symbol Min Typ Max Min Typ Max Unit

Reference Input Voltage (Figure 1)

VKA = Vref, IK = 10 mA

TA = 25°C

TA = Tlow to Thigh (Note 1)

Reference Input Voltage Deviation Over

Temperature Range (Figure 1, Notes 1, 2)

VKA= Vref, IK = 10 mA

Ratio of Change in Reference Input Voltage

to Change in Cathode to Anode Voltage

IK = 10 mA (Figure 2),

∆VKA = 10 V to Vref

∆VKA = 36 V to 10 V

Reference Input Current (Figure 2)

IK = 10 mA, R1 = 10 k, R2 = ∞

TA = 25°C

TA = Tlow to Thigh (Note 1)

Reference Input Current Deviation Over

Temperature Range (Figure 2, Note 1, 4)

IK = 10 mA, R1 = 10 k, R2 = ∞

Minimum Cathode Current For Regulation

VKA = Vref (Figure 1)

Off–State Cathode Current (Figure 3)

VKA = 36 V, Vref = 0 V

Dynamic Impedance (Figure 1, Note 3)

VKA = Vref, ∆IK = 1.0 mA to 100 mA

f ≤ 1.0 kHz

Vref

∆Vref

2.44 2.495 2.55 2.44 2.495 2.55

2.41 – 2.58 2.423 – 2.567

– 7.0 30 – 3.0 17 mV

DVref

DVKA

mV/V

– –1.4 –2.7 – –1.4 –2.7

– –1.0 –2.0 – –1.0 –2.0

Iref µA

∆Iref

– 1.8 4.0 – 1.8 4.0

– – 6.5 – – 5.2

– 0.8 2.5 – 0.4 1.2 µA

Imin

Ioff

|ZKA|

– 0.5 1.0 – 0.5 1.0 mA

–

260 1000

–

260 1000

– 0.22 0.5

Ω

NOTES: 1. Tlow = –40°C for TL431AIP TL431AILP, TL431IP, TL431ILP, TL431BID, TL431BIP, TL431BILP, TL431AIDM, TL431IDM, TL431BIDM

= 0°C for TL431ACP, TL431ACLP, TL431CP, TL431CLP, TL431CD, TL431ACD, TL431BCD, TL431BCP, TL431BCLP, TL431CDM,

TL431ACDM, TL431BCDM

Thigh= +85°C for TL431AIP, TL431AILP, TL431IP, TL431ILP, TL431BID, TL431BIP, TL431BILP, TL431IDM, TL431AIDM, TL431BIDM

= +70°C for TL431ACP, TL431ACLP, TL431CP, TL431ACD, TL431BCD, TL431BCP, TL431BCLP, TL431CDM, TL431ACDM, TL431BCDM

2. The deviation parameter ∆Vref is defined as the difference between the maximum and minimum values obtained over the full operating ambient

temperature range that applies.

Vref max

Vref min

∆Vref = Vref max

–Vref min

∆TA = T2 – T1

T1 Ambient Temperature T2

The average temperature coefficient of the reference input voltage, αVref is defined as:

ǒ Ǔppm

+ +Vref _C

D Vref

Vref @ 25_C

D TA

X 106

D Vref x 106

D TA (Vref @ 25_C)

αVref can be positive or negative depending on whether Vref Min or Vref Max occurs at the lower ambient temperature. (Refer to Figure 6.)

+Example : DVref 8.0 mV and slope is positive,

+ + + + ńVref @ 25_C 2.495 V, DTA 70_C

a Vref

0.008 x 106

70 (2.495)

45.8 ppm _C

+3. The dynamic impedance ZKA is defined as |ZKA|

D VKA

D IK

Ȁ [ ǒ ) ǓWhen the device is programmed with two external resistors, R1 and R2, (refer to Figure 2) the total dynamic impedance of the circuit is defined as:

|ZKA |

|ZKA|

MOTOROLA ANALOG IC DEVICE DATA

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TL431	PROGRAMMABLE PRECISION REFERENCES	ON Semiconductor

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