Diodes AN431 - Manual (Page 11)

Data Sheet
11
Dec. 2012 Rev. 2. 0 BCD Semiconductor Manufacturing Limited
ADJUSTABLE PRECISION SHUNT REGULATORS AN431
V
IN
V
OUT
R1
R2
V
REF
AN431
R3
V
IN
V
OUT
R4
R1
R2
V
REF
R3
AN431
I
OUT
V
IN
AN431
R2
R1
Figure 17. Shunt Regulator
Figure 18. High Current Shunt Regulator
V
OUT
=(1+R1/R2)*V
REF
V
OUT
=(1+R2/R3)*V
REF
I
OUT
=V
REF
/R2 + I
KA
Figure 19. Current Source or Current Limit
Typical Application