Adjustable Accurate Reference Source

TL431

Features

The output voltage can be adjusted to 36V

Low dynamic output impedance, its typical value is 0.2

Trapping current capability is 1 to 100mA

The typical value of the equivalent temperature factor in the

whole temperature scope is 50 ppm/

The effective temperature compensation in the working

range of full temperature

Low output noise voltage

Fast on-state response

Electrical Characteristics (Ta = 25

unless otherwise specified)

Parameter

Symbol

Testconditons

Min

Typ

Max

Unit

Reference Input Voltage

2.45

2.5

2.55

V

Deviation of Reference Input Voltage

Over Temperature

(*)

Ratio of Change in Reference Input Voltage

-1.0

-2.7

mV/V

to the Change in Cathode Voltage

10V

-0.5

-2.0

mV/V

Reference Input Current

1.5

4

A

Deviation of Reference Input Current

Over Full Temperature Range

Minimum Cathode Current for Regulation

0.45

1.0

mA

Off-state Cathode Current

0.05

1.0

A

Dynamic Impedance

f

1.0KHz

0.15

0.5

mV

0.4

1.2

A

T

T

4.5

17

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1

SMD Type

IC

SOT-23

Unit: mm

2.9

0.1

0.4

0.1

0.95

0.1

1.9

0.1

0.1

+0.05

-0.01

1

2

3

1.Reference

2.Cathode

3.Anode

Parameter

Symbol

Rating

Unit

Cathode Voltage

37

V

Cathode Current Range (Continuous)

-100

+150

mA

Reference Input Current Range

0.05

+10

mA

Power Dissipation

350

mW

Operating Temperature

0

70

Storage Temperature Range

-65

+150