TL431 datasheet(2/12 Pages) IKSEMICON

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TL431

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

TL431 (2%)

TL431-A (1%)

TL431-C (0.5%)

2.440

2.470

2.482

2.495

2.550

2.520

2.508

Deviation of Reference Input

Voltage Over Full Temperature

Range

VREF(dev)

Tmin ≤ Ta ≤ Tmax

Ratio of Change in Reference Input

Voltage to the Change in Cathode

Voltage

REF

ΔV

KA = 10V-VREF

ΔV

KA = 36V- 10V

-1.4

-1.0

-2.7

-2.0

mV/V

Reference Input Current

IREF

R1 = 10KΩ, R2 = ∞

1.8

㎂

Deviation of Reference Input

Current Over Full Temperature

Range

IREF(dev)

R1 = 10KΩ, R2 = ∞

0.4

1.2

㎂

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

㎂

Dynamic Impedance

ZKA

IK = 10mA to 100 mA , f ≤ 1.0KHz

0.22

0.5

Rev. 00

TEST CIRCUITS

Figure 1. Test Circuit for VKA = VREF

Figure 2. Test Circuit for VKA ≥ VREF

Figure 3. Test Circuit for I off

IK(OFF)

BT432

INPUT

VKA

TL431

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