Electrical characteristics

TL431, TL432

8/22

DocID4467 Rev 17

Reference input voltage deviation overtemperature range

∆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

Figure 6. Reference input voltage deviation overtemperature range

Table 6. TL431IY (Tamb = 25 °C unless otherwise specified)

Symbol

Parameter

TL431IY

TL431AIY

Unit

Min.

Typ.

Max.

Min.

Typ.

Max.

Vref

Reference input voltage

VKA = Vref, Ik = 10 mA

Tmin ≤ Tamb ≤ Tmax

2.44

2.41

2.495

-

2.55

2.58

2.47

2.44

2.495

-

2.52

2.55

V

∆V

ref

Reference input voltage deviation overtemperature

range(1)

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

-

7

30

-

7

30

mV

Ratio of change in reference input voltage to change

in cathode to anode voltage

Ik = 10 mA, ∆VKA = 10 V to Vref

Ik = 10 mA, ∆VKA = 36 V to 10 V

-2.7

-2

-1.4

-1

-

-

-2.7

-2

-1.4

-1

-

-

mV/V

Iref

Reference input current

Ik = 10 mA, R1 = 10 kΩ, R2 = ∞

Tmin ≤ Tamb ≤ Tmax

-

-

1.8

-

4

6.5

-

-

1.8

-

4

6.5

µA

∆I

ref

Reference input current deviation overtemperature

range

Ik = 10 mA, R1 = 10 kΩ, R2 = ∞, Tmin ≤ Tamb ≤

Tmax

-

0.8

2.5

-

0.8

1.2

µA

Imin

Minimum cathode current for regulation

VKA = Vref

-

0.5

1

-

0.5

0.6

mA

Ioff

Off-state cathode current

Tmin ≤ Tamb ≤ Tmax

-

-

2.6

1000

3000

-

-

2.6

1000

3000

nA

ZKA

Dynamic impedance(2)

VKA = Vref, ∆ Ik = 1 to 100 mA, F ≤ 1 kHz

-

0.22

0.5

-

0.22

0.5

Ω

1. See definition of Section : Reference input voltage deviation overtemperature range below.

2. The dynamic impedance is defined as

|ZKA| =

∆Vref

∆Vka

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

∆V

KA

I

k

∆

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