TLV431, TLV431A, TLV431B

LOW VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR

SLVS139S − JULY 1996 − REVISED JANUARY 2006

6

POST OFFICE BOX 655303

TLV431 electrical characteristics at 25

°C free-air temperature (unless otherwise noted)

PARAMETER

TEST CONDITIONS

TLV431

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

TA = 25°C

1.222

1.24

1.258

VREF

Reference voltage

VKA = VREF,

TA = full range

TLV431C

1.21

1.27

V

VREF

Reference voltage

VKA = VREF,

IK = 10 mA

TA = full range

(see Note 4 and

Figure 1)

TLV431I

1.202

1.278

V

IK = 10 mA

(see Note 4 and

Figure 1)

TLV431Q

1.194

1.286

VREF deviation over full

VKA = VREF, IK = 10 mA

TLV431C

4

12

VREF(dev)

VREF deviation over full

temperature range (see Note 4)

VKA = VREF, IK = 10 mA

(see Note 4 and Figure 1)

TLV431I

6

20

mV

VREF(dev) temperature range (see Note 4)

(see Note 4 and Figure 1)

TLV431Q

11

31

mV

∆VREF

∆VKA

Ratio of VREF change in cathode

voltage change

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

− 1.5

− 2.7

mV/V

Iref

Reference terminal current

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

0.15

0.5

µA

TLV431C

0.05

0.3

Iref deviation over full

IK = 10 mA, R1 = 10 kΩ, R2 = open

TLV431C

0.05

0.3

Iref(dev)

Iref deviation over full

temperature range (see Note 4)

IK = 10 mA, R1 = 10 kΩ, R2 = open

(see Note 4 and Figure 2)

TLV431I

0.1

0.4

µA

Iref(dev)

temperature range (see Note 4)

(see Note 4 and Figure 2)

TLV431Q

0.15

0.5

µA

IK(min)

Minimum cathode current for

VKA = VREF (see Figure 1)

TLV431C/I

55

80

A

IK(min)

Minimum cathode current for

regulation

VKA = VREF (see Figure 1)

TLV431Q

55

100

µA

IK(off)

Off-state cathode current

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

0.001

0.1

µA

|zKA|

Dynamic impedance

(see Note 5)

VKA = VREF, f ≤ 1 kHz,

IK = 0.1 mA to 15 mA (see Figure 1)

0.25

0.4

Ω

NOTES:

4. 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.

5. 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:

αV

REF

ppm

°C +

V

REF(dev)

V

106

∆T

A

where

∆TA 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.

6. The dynamic impedance is defined as z

ka +

∆V

KA

∆I

K

When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is defined

as:

z

ka +

∆V

∆I [

z

ka

1

) R1

R2