Philips Semiconductors

Product specification

TL431C, TL431AC, TL431I,

TL431AI, LM431AC

Adjustable precision shunt regulators

1997 Feb 25

4

DC ELECTRICAL CHARACTERISTICS

25

°C free-air temperature, unless otherwise stated.

TEST

LIMITS

SYMBOL

PARAMETER

TEST

CKT

TEST CONDITIONS

TL431AC

TL431C/LM431AC

UNIT

CKT

MIN

TYP

MAX

MIN

TYP

MAX

Reference input voltage

Fig. 3

2470

2495

2520

2440

2495

2550

mV

Deviation of reference input

voltage over full

Fig. 3

4

15

4

17

mV

DV

REF

Ratio of change in reference

input voltage to the change

Fig 4

I = 10mA

–1.4

–2.7

–1.4

–2.7

mV/V

REF

DV

KA

in ut voltage to the change

in cathode voltage

Fig. 4

–1

–2

–1

–2

mV/V

Reference input current

Fig. 4

2

4

2

4

µA

Deviation of reference input

current over full temperature

Fig. 4

0.8

1.2

0.4

1.2

µA

Minimum cathode current

for regulation

Fig. 3

0.4

0.6

0.4

1

mA

Off-state cathode current

Fig. 5

0.1

0.5

0.1

1

µA

Fig. 3

f

≤ 1kHz

0.2

0.5

0.2

0.5

Ω

25

°C free-air temperature, unless otherwise stated.

TEST

LIMITS

SYMBOL

PARAMETER

TEST

CKT

TEST CONDITIONS

TL431AI

TL431I

UNIT

CKT

MIN

TYP

MAX

MIN

TYP

MAX

Reference input voltage

Fig. 3

2470

2495

2520

2440

2495

2550

mV

Deviation of reference input

voltage over full

Fig. 3

5

25

5

30

mV

DV

REF

Ratio of change in reference

input voltage to the change

Fig 4

I = 10mA

–1.4

–2.7

–1.4

–2.7

mV/V

REF

DV

KA

in ut voltage to the change

in cathode voltage

Fig. 4

–1

–2

–1

–2

mV/V

Reference input current

Fig. 4

2

4

2

4

µA

Deviation of reference input

current over full temperature

Fig. 4

0.8

2.5

0.8

2.5

µA

Minimum cathode current

for regulation

Fig. 3

0.4

0.7

0.4

1

µA

Off-state cathode current

Fig. 5

0.1

0.5

0.1

1

µA

Fig. 3

f

≤ 1kHz

0.2

0.5

0.2

0.5

Ω

NOTES:

2. Full temperature range is –40

°C to +85°C for the TL431I and TL431AI, and 0°C to +70°C for the TL431C and TL431AC.

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

|

aV

ppm

deg C

+

V

REF(dev)

V

REF

at 25oC

DT

amb

where