PROGRAMMABLE PRECISION REFERENCE
FEATUR
*Programmable output voltage to 36V
*Low dynamic output impedance 0.2ohm
*Sink current capability of 1.0 to 100mA
*Equivalent full-range temperature coefficient of 50ppm/℃
tical for operation over full rated operating temperature range
APPLICATIONS
*Shunt regulator,Seri regulator,Switching regulator,
Voltage reference and others.
ABSOLUTE MAXIMUM RATINGS at Tamb=250C
Symbol Rating Unit
VKA 37 V PIN:
Cathode Current Range(Continuous) IKA -100～+150 mA STYLE
Reference Input Current range IREF -0.05～+10 mA
Operating Junion Temperature Tj 150 ℃
Topr 0～+70 ℃
Tstg -65~150 ℃
RECOMMENDED OPERATING CONDITIONS
Symbol Min T MAX UNIT
Cathode Voltage VKA VREF 36 V
Cathode Current IKA 1 100 mA
ELERICAL CHARAERISTICS at Tamb=250C
Symbol Min T Max Unit
2.483 2.495 2.507 V
TL431 1% 2.47 2.495 2.52 V
TL431 2% 2.44 2.495 2.55 V
⊿Vref /
⊿T
4.5 17 mV
⊿Vref /
⊿VKA
-1 -2.7 mV/V
⊿Vref /
⊿VKA
-0.5 -2 mV/V
Iref 1.5 4 uA
⊿Iref /
⊿T
0.4 1.2 uA
IKA(min) 0.45 1 mA
IKA(OFF) 0.05 1.0 uA
Dynamic Impedance ZKA 0.15 0.5 ohm
Tt Conditions
Reference Input Voltage TL431 0.5%
Deviation of reference Input Current Over
Full Temperature Range
Off-State Cathode Current VKA=36V,VREF=0
Vref VKA=VREF,IKA=10mA
TL431
1 2 3
R A K
Package: TO-92
LINEAR INTEGRATED CIRCUIT
Charaeristic
Charaeristic
Reference Input Current
VKA=VREF,IKA=1 to
100mA,f=1.0kHz
Charaeristic
Cathode Voltage
Ratio of change in reference input voltage
to the change in cathode voltage
IKA=10mA,⊿VKA=36V～10V
Storage Temperature
Operating Ambient Temperature
VKA=VREF
VKA=VREF,IKA=10mA;0℃≦T
A≦70℃
Ratio of change in reference input voltage
to the change in cathode voltage
IKA=10mA,⊿VKA=10V～VREF
IKA=10mA,R1=10Kohm,R2=∞
IKA=10mA,R1=10Kohm,R2=
∞,TA=full temperatureTL431 穩(wěn)壓電源,運放電路,數(shù)字表,用于充電器.電源.