TLV431, TLV431A, TLV431B

LOW-VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATOR

SLVS139T − JULY 1996 − REVISED JUNE 2007

7

POST OFFICE BOX 655303

TLV431A electrical characteristics at 25

°C free-air temperature (unless otherwise noted)

PARAMETER

TEST CONDITIONS

TLV431A

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

1.228

1.24

1.252

V

Reference voltage

TLV431AC

1.221

1.259

V

Reference voltage

(see Note 3 and

TLV431AI

1.215

1.265

V

(see Note 3 and

Figure 1)

TLV431AQ

1.209

1.271

V

d

i ti

f ll

V

V

I

10

A

TLV431AC

4

12

temperature range (see Note 4)

(see Note 3 and Figure 1)

TLV431AI

6

20

mV

temperature range (see Note 4)

(see Note 3 and Figure 1)

TLV431AQ

11

31

mV

voltage change

− 1.5

− 2.7

mV/V

Reference terminal current

0.15

0.5

µA

I

d

i ti

f ll

I

10

A R1

10 k

Ω R2

TLV431AC

0.05

0.3

temperature range (see Note 4)

(see Note 3 and Figure 2)

TLV431AI

0.1

0.4

µA

temperature range (see Note 4)

(see Note 3 and Figure 2)

TLV431AQ

0.15

0.5

µA

I

Minimum cathode current for

V

V

(see Figure 1)

TLV431AC/AI

55

80

A

Minimum cathode current for

regulation

TLV431AQ

55

100

µA

Off-state cathode current

0.001

0.1

µA

Dynamic impedance

(see Note 5)

0.25

0.4

Ω

NOTES:

3. Full temperature ranges are − 40

°C to 125°C for TLV431AQ, −40°C to 85°C for TLV431AI, and 0°C to 70°C for TLV431AC.

obtained over the rated temperature range. The average full-range temperature coefficient of the reference input voltage,

is defined as:

αV

REF

ppm

°C +

V

REF(dev)

V

106

∆T

A

where

lower temperature.

5. 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