Diodes AN431 - Manual (Page 6)

ADJUSTABLE PRECISION SHUNT REGULATORS AN431
Data Sheet
6
Dec. 2012 Rev. 2. 0 BCD Semiconductor Manufacturing Limited
Figure 4. Test Circuit 4 for V
KA
=V
REF
Figure 5. Test Circuit 5 for V
KA
>V
REF
Figure 6. Test Circuit 6 for I
OFF
I
OFF
V
IN
V
KA
Electrical Characteristics (Continued)
V
IN
V
KA
R1
I
KA
V
REF
V
IN
V
KA
I
KA
R1
R2
V
REF
V
KA
=V
REF
*(1+R1/R2)+ I
REF
*R1
I
REF
R3