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TL431_12 Datasheet, PDF (5/7 Pages) Unisonic Technologies – 4PROGRAMMABLE PRECISION REFERENCE
TL431
„ TEST CIRCUIT
INPUT
VKA
IKA
LINEAR INTEGRATED CIRCUIT
VREF
UTC TL431
For VKA=VREF
„ APPLICATION CIRCUIT
VKA=VREF×(1+R1/R2)+IREF×R1
For VKA≥VREF
For IKA(OFF)
VOUT=(1+R1/R2)×VREF
Shutdown Regulator
VOUT=(1+R1/R2)×VREF
Minimum VOUT=VREF+5V
Output Control of a Three
-Terminal Fixed Regulator
VOUT=(1+R1/R2)×VREF
Higher-current Shunt Regulator
VIN
VOUT
IOUT
VIN
RS
IOUT
RCL
VOUT
RS
UTC
TL431
IOUT=VREF/RS
Constant-current Sink
UTC
TL431
IOUT =VREF/RCL
Current Limiting or Current Source
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R103-003.AG