TL431CDBVR datasheet(13/78 Pages) TI1

13 / 78 page

7.12 Electrical Characteristics, TL431BI, TL432BI

over recommended operating conditions, TA = 25°C (unless otherwise noted)

PARAMETER

TEST CIRCUIT

TEST CONDITIONS

MIN TYP MAX

UNIT

Vref

Reference Voltage

See Figure 8-1

VKA = Vref, IKA = 10 mA

2483 2495 2507

VI(dev)

Deviation of reference

input voltage over full

temperature range (1)

See Figure 8-1

VKA = Vref, IKA = 10 mA

ΔVref /

ΔVKA

Ratio of change in

reference voltage to

the change in cathode

voltage

See Figure 8-2

IKA = 10 mA

ΔVKA = 10 V - Vref

–1.4 –2.7

mV/V

ΔVKA = 36 V - 10 V

–1

–2

mV/V

Iref

Reference Input Current See Figure 8-2

IKA = 10 mA, R1 = 10kΩ, R2 = ∞

µA

II(dev)

Deviation of reference

input current over full

temperature range (1)

See Figure 8-2

IKA = 10 mA, R1 = 10kΩ, R2 = ∞

0.8

2.5

µA

Imin

Minimum cathode

current for regulation

See Figure 8-1

VKA = Vref

0.4

0.7

Ioff

Off-state cathode current See Figure 8-3

VKA = 36 V, Vref = 0

0.1

0.5

µA

|ZKA|

Dynamic Impedance (2)

See Figure 8-1

VKA = Vref, f ≤ 1 kHz,

IKA = 1 mA to 100 mA

0.2

0.5

Ω

(1)

The deviation parameters VI(dev) and II(dev) are defined as the differences between the maximum and minimum values obtained over

the rated temperature range. For more details on VI(dev) and how it relates to the average temperature coefficient, see Temperature

Coefficient.

(2)

The dynamic impedance is defined by |ZKA| = ΔVKA/ΔIKA. For more details on |ZKA| and how it relates to VKA, see Dynamic

Impedance.

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TL431, TL432

SLVS543R – AUGUST 2004 – REVISED OCTOBER 2023

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