TL431, TL431A, TL431B, TL432, TL432A, TL432B

ADJUSTABLE PRECISION SHUNT REGULATORS

SLVS543A – AUGUST 2004 − REVISED AUGUST 2004

18

POST OFFICE BOX 655303

Figure 9

1.5

1

0.5

0

−75

−25

0

50

2

OFF-STATE CATHODE CURRENT

vs

FREE-AIR TEMPERATURE

2.5

100

125

−50

25

75

TA − Free-Air Temperature − °C

VKA = 36 V

Vref = 0

Figure 10

−1.15

−1.25

−1.35

−1.45

−1.05

− 0.95

RATIO OF DELTA REFERENCE VOLTAGE TO

DELTA CATHODE VOLTAGE

vs

FREE-AIR TEMPERATURE

− 0.85

TA − Free-Air Temperature − °C

−75

−25

0

50

100

125

−50

25

75

VKA = 3 V to 36 V

180

140

120

100

10

100

1 k

220

240

f − Frequency − Hz

EQUIVALENT INPUT NOISE VOLTAGE

vs

FREQUENCY

260

10 k

100 k

200

160

IO = 10 mA

TA = 25°C

Figure 11

† Data at high and low temperatures is applicable only within the recommended operating free-air temperature ranges of the various devices.