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Typical Application
Fig 4. Shunt Regulator
Fig 5. High Current Shunt Regulator
Vcc
R1
Vout
Vcc
R1
Vout
R2
R2
Vout=(1+R
1
/R
2
)V
REF
Fig 6. Output Control of a Three-Terminal Fixed
Regulator
Vcc
Vout
R1
Vout=(1+R
1
/R
2
)V
REF
Fig 7. Series Pass Regulator
Vcc
IN
AX7805
Vout
R1
OUT
COMMON
R2
R2
Vout=(1+R
1
/R
2
)V
REF
; V
out(min)
=V
REF
+5V
Vout=(1+R
1
/R
2
)V
REF
; V
out(min)
=V
REF
+V
BE
Fig 8. Current Limiter or Current Source
Fig 9. Constant Current Sink
Vcc
Vcc
RCL
Iout
Isink
Rs
Iout=V
REF
/R
CL
Isink=V
REF
/R
S
DS-RS431L-01 October, 2006
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