TL431CPWR datasheet(6/83 Pages) TI

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7.5 Electrical Characteristics, TL431C, TL432C

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

PARAMETER

TEST CIRCUIT

TEST CONDITIONS

TL431C, TL432C

UNIT

MIN

TYP

MAX

Vref

Reference voltage

See Figure 8-1 VKA = Vref, IKA = 10 mA

2440

2495

2550

VI(dev)

Deviation of reference input

voltage over full temperature

range(1)

See Figure 8-1

VKA = Vref,

IKA = 10 mA,

SOT23-3 and TL432

devices

All other devices

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

Iref

Reference input current

See Figure 8-2 IKA = 10 mA, R1 = 10 kΩ, R2 = ∞

µA

II(dev)

Deviation of reference input

current over full temperature

range(1)

See Figure 8-2 IKA = 10 mA, R1 = 10 kΩ, R2 = ∞

0.4

1.2

µA

Imin

Minimum cathode current for

regulation

See Figure 8-1 VKA = Vref

0.4

Ioff

Off-state cathode current

See Figure 8-3 VKA = 36 V, Vref = 0

0.1

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 Vref(dev) and Iref(dev) are defined as the differences between the maximum and minimum values obtained over

the rated temperature range. The average full-range temperature coefficient of the reference input voltage αVref is defined as:

αVref is positive or negative, depending on whether minimum Vref or maximum Vref, respectively, occurs at the lower temperature.

(2)

The dynamic impedance is defined as:

∆I

∆V

|z | =

When the device is operating with two external resistors (see Figure 8-2), the total dynamic impedance of the circuit is given by:

∆I

∆V

|z'| =

which is approximately equal to

|z |

(1 +

(

TL431, TL432

SLVS543Q – AUGUST 2004 – REVISED JULY 2022

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