5.5 Electrical Characteristics for TLV431

at 25°C free-air temperature (unless otherwise noted)

PARAMETER

TEST CONDITIONS

TLV431

UNIT

MIN

TYP

MAX

VREF

Reference voltage

VKA = VREF,

IK=10mA

TA = 25°C

1.222

1.24

1.258

V

TA = full range

(1)

(see Figure 6-1)

TLV431C

1.21

1.27

TLV431I

1.202

1.278

TLV431Q

1.194

1.286

VREF(dev)

VREF deviation over full

temperature range(2)

VKA = VREF, IK = 10mA

(1) (see

Figure 6-1)

TLV431C

4

12

mV

TLV431I

6

20

TLV431Q

11

31

Ratio of VREF change in cathode

voltage change

VKA = VREF to 6V, IK = 10mA (see Figure 6-2)

-1.5

-2.7

mV/V

Iref

Reference terminal current

IK = 10mA, R1 = 10kΩ, R2 = open (see Figure 6-2)

0.15

0.5

µA

Iref(dev)

Iref deviation over full

temperature range(2)

IK = 10mA, R1 =10kΩ, R2 =

open

(1) (see Figure 6-2)

TLV431C

0.05

0.3

µA

TLV431I

0.1

0.4

TLV431Q

0.15

0.5

IK(min)

Minimum cathode current for

regulation

VKA = VREF (see Figure 6-1)

TLV431C/I

55

80

µA

TLV431Q

55

100

IK(off)

Off-state cathode current

VREF = 0, VKA = 6V (see Figure 6-3)

0.001

0.1

µA

|zKA|

Dynamic impedance(3)

VKA = VREF, f ≤ 1kHz, IK = 0.1mA to 15mA (see

Figure 6-1)

0.25

0.4

Ω

(1)

Full temperature ranges are –40°C to 125°C for TLV431Q, –40°C to 85°C for TLV431I, and 0°C to 70°C for TLV431C.

(2)

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:

where ΔTA is the rated operating free-air temperature range of the device. αVREF can be positive or negative, depending on whether

minimum VREF or maximum VREF, respectively, occurs at the lower temperature.

(3)

The dynamic impedance is defined as

. When the device is operating with two external resistors (see Figure 6-2), the

total dynamic impedance of the circuit is defined as:

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TLV431, TLV431A, TLV431B

SLVS139Z – JULY 1996 – REVISED JUNE 2024

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