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| TL431_11 Datasheet, PDF (5/7 Pages) Fairchild Semiconductor – Programmable Shunt Regulator | |||
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TL431
 TEST CIRCUIT
LINEAR INTEGRATED CIRCUIT
INPUT
VKA
IKA(OFF)
UTC TL431
For VKA=VREF
 APPLICATION CIRCUIT
VKA=VREFÃ(1+R1/R2)+IREFÃR1
For VKAâ¥VREF
For IKA(OFF)
VOUT=(1+R1/R2)ÃVREF
Shutdown Regulator
VOUT=(1+R1/R2)ÃVREF
Minimum VOUT=VREF+5V
VOUT=(1+R1/R2)ÃVREF
Output Control of a Three Higher-current Shunt Regulator
-Terminal Fixed Regulator
IOUT=VREF/RS
Constant-current Sink
IOUT =VREF/RCL
Current Limiting or Current Source
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 7
QW-R103-003,AC
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