TL431BCP datasheet(4/12 Pages) FCI

部件名	TL431BCP

功能描述	Programmable Precision Reference Sink Current Capability of 1.0 to 100mA

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制造商	FCI [First Components International]

网页	http://www.cotra.com.tw/

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4 / 12 page

4

2001-05-A

TL431 Programmable Precision Reference

--

1.8

4.0

Reference Input Current (Figure 2)

IK=10mA, R1=10k, R2=∞

TA=+25℃

TA=Tlow to Thigh (Note 1)

Iref

--

5.2

µA

Reference Input Current Deviation Over

Temperature Range (Figure 2, Note 1)

IK=10mA, R1=10k, R2=∞

ΔIref

--

0.4

1.2

µA

Minimum Cathode Current for Regulation

VKA=Vref (Figure 1)

Imin

--

0.5

1.0

mA

Off-State Cathode Current (Figure 3)

VKA=36V, Vref =0V

Ioff

--

260

1000

nA

Dynamic Impedance (Figure 1, Note 3)

VKA=Vref, ΔIK=1.0mA to 100mA, f< 1.0kHz

|ZKA|

--

0.22

0.5

Ω

1

Tlow=0℃,

Thigh=+70℃

2

The deviation parameter ΔVref is defined as the differences between the maximum and

minimum values obtained over the full operating ambient temperature range the applies.

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

αVref

C

°

ppm

=

A

ref

T

C

V

∆

×

°

∆

6

10

25

@

=

)

25

@

(

10

6

C

V

T

V

ref

A

ref

°

∆

×

∆

αVref can be positive or negative depending on whether Vref Min of Vref Max occurs at the

lower ambient temperature. (Refer to Figure 6)

Example: ΔVref =8.0mV and slope is positive, Vref @25℃=2.495V, ΔTA=70℃

αVref =

)

495

.

2

(

70

10

008

.

0

6

×

=45.8 ppm/℃

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