Electrical Characteristics

TL431

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3

Electrical Characteristics

Table 3.

Symbol

Parameter

TL431C

TL431AC

Unit

Min.

Typ.

Max.

Min.

Typ.

Max.

Reference Input Voltage

2.44

2.423

2.495

2.55

2.567

2.47

2.453

2.495

2.52

2.537

V

∆V

ref

Reference Input Voltage Deviation Over Temperature

1.

∆V

317

3

15

mV

Ratio of Change in Reference Input Voltage to Change

in Cathode to Anode Voltage

Ik = 10mA -

∆V

∆V

-1.4

-1

-2.7

-2

-1.4

-1

-2.7

-2

mV/V

Reference Input Current

Ik = 10mA, R1 = 10k

Ω, R2 = ∞

1.8

4

5.2

1.8

4

5.2

µA

∆I

ref

Reference Input Current Deviation Over Temperature

Range

Ik = 10mA, R1 = 10k

Ω, R2 =∞

0.4

1.2

0.4

1.2

µA

Minimum Cathode Current for Regulation

0.5

1

0.5

0.6

mA

Off-State Cathode Current

2.6

1000

2.6

1000

nA

⏐ZKA⏐

2.

The dynamic Impedance is definied as

0.22

0.5

0.22

0.5

Ω

T1

T2

Temperature

∆Vref

∆Vka

------------

∆VKA

∆IK

-----------------