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TL431 Adjustable Accurate Reference Source

1.REFERENCE

2.ANODE

3. CATHODE

1 2 3

FEATURES

The output voltage can be adjusted to 36V

Low dynamic output impedance ,its typical value is 0.2Ω

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

temperatureLow output noise voltage

Fast on-state response

ABSOLUTE MAXIMUM RATINGS(Operating temperature range applies unless otherwise specified)

Parameter SYMBOL VALUE UNITS

Cathode Voltage VkA 37 V

Cathode Current(Continoues) IKA -100-+150 mA

Reference input Current Range Iref 0.05-+10 mA

Power Dissipation PD 770 mW

Operating temperature Topr 0-70 ℃

Storage temperature Range Tstg -65-+150℃ ℃

ELECTRICAL CHARCTERISTICS (Tamp=25℃ unless otherwise specified) Note:TMIN=0℃,TMAX=+70℃

Parameter Symbol Test conditions MIN TYP MAX UNIT

Reference Input Voltage Vref VKA=VREF,IkA=10mA 2.445 2.495 2.545 V

Deviation of reference Input Voltage

Over temperature(note) △Vref/△T

VKA=VREF,IkA=10mA

Tmin≤Ta≤Tmax 4.5 17 mV

△ VKA

=10V~ VREF -1.0 -2.7 mV/V

Ratio Of Change in Reference Input

Voltage to the change in Cathode

Voltage △Vref/△VKA

IkA=10mA

△VKA

=36V~10V -0.5 -2.0

mV/V

Reference Input Current Iref IkA=10 mA,R1=10ΚΩ,R2=∞ 1.5 4 uA

Deviation Of Reference Input Current

Over Full Temperature Range △Iref/△T IkA=10 mA,R1=10ΚΩ,R2=∞

TA=full Temperature 0.4 1.2

uA

Minimum cathode current for regulation IKA(min) VKA =VREF 0.45 1.0 mA

Off-state cathode Current IKA(oFF) VKA=36V, VREF=0 0.05 1.0 uA

Dynamic Impedance ZKA

VKA =VREF,IKA=1to100mA

f≤1.0KHZ 0.15 0.5 Ω

Note:TMIN=0℃,TMAX=+70℃

CLASSIFICATION OF Vref

Rank 0.5% 1% 2%

Range 2.483-2.507 2.470-2.520 2.445-2.545