TL431AM datasheet(2/3 Pages) ESTEK

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TL431AM (chips)

RECOMMENDED OPERATING CONDITIONS

Characteristic

Symbol

Test Condition

Min

Typ

Max

Unit

Cathode Voltage

VKA

VREF

Cathode Current

0.5

100

ELECTRICAL CHARACTERISTICS

(Ta = 25

oC, V

KA = VREF, IK = 10mA unless otherwise specified)

Characteristic

Symbol

Test Condition

Min

Typ

Max

Unit

Reference Input Voltage

VREF

VKA = VREF, IK = 10mA

2.475

2.495

2.505

Deviation of Reference Input Voltage

Over Full Temperature Range

VREF(dev)

Tmin

≤ Ta ≤ T

max

Ratio of Change in Reference Input

Voltage to the Change in Cathode

Voltage

∆

REF

∆V

KA = 10V-VREF

∆V

KA = 36V- 10V

-1.4

-1.0

-2.7

-2.0

mV/V

Reference Input Current

IREF

R1 = 10K

Ω, R

2 =

∞

1.8

µA

Deviation of Reference Input Current

Over Full Temperature Range

IREF(dev)

R1 = 10K

Ω, R

2 =

∞

0.4

1.2

µA

Minimum Cathode Current for

Regulation

IK(min)

0.25

0.5

Off-State Cathode Current

IK(off)

VKA = 40 V, VREF = 0

0.26

0.9

µA

Dynamic Impedance

ZKA

IK = 1mA to 100 mA , f

≤ 1.0KHz

0.22

0.5

Ω

TEST CIRCUITS

Fig.1. Test Circuit for VKA = VREF

Fig.2. Test Circuit for VKA

≥ V

REF

Fig.3. Test Circuit for Ioff

IK(OFF)

BT432

I NPUT

VKA

TL431

VKA

≥ V

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