TL431AIZ datasheet(4/13 Pages) STMICROELECTRONICS

Teilenummer	TL431AIZ

Bauteilbeschribung	Programmable Voltage Reference

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Electrical Characteristics

TL431

4/13

3

Electrical Characteristics

Table 3.

Tamb = 25°C (unless otherwise specified)

Symbol

Parameter

TL431C

TL431AC

Unit

Min.

Typ.

Max.

Min.

Typ.

Max.

Vref

Reference Input Voltage

VKA = Vref , Ik = 10 mA, Tamb = 25°C

Tmin ≤Tamb ≤ Tmax

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

Range (1)

VKA = Vref, Ik = 10 mA, Tmin ≤Tamb ≤ Tmax

1.

∆V

ref is defined as the difference between the maximum and minimum values obtained over the full temperature range.

∆V

ref = Vref max. - Vref min.

317

3

15

mV

Ratio of Change in Reference Input Voltage to Change

in Cathode to Anode Voltage

Ik = 10mA -

∆V

KA = 10V to Vref

∆V

KA = 36V to 10V

-1.4

-1

-2.7

-2

-1.4

-1

-2.7

-2

mV/V

Iref

Reference Input Current

Ik = 10mA, R1 = 10k

Ω, R2 = ∞

Tamb = 25°C

Tmin ≤Tamb ≤Tmax

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 =∞

Tmin ≤Tamb ≤ Tmax

0.4

1.2

0.4

1.2

µA

Imin

Minimum Cathode Current for Regulation

VKA = Vref

0.5

1

0.5

0.6

mA

Ioff

Off-State Cathode Current

2.6

1000

2.6

1000

nA

⏐ZKA⏐

Dynamic Impedance (2)

VKA = Vref , ∆ Ik = 1 to100mA, f ≤1kHZ

2.

The dynamic Impedance is definied as

|ZKA| =

0.22

0.5

0.22

0.5

Ω

T1

T2

Temperature

V ref max.

V ref min.

∆Vref

∆Vka

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

∆VKA

∆IK

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

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