APL431
Test figures
V
IN
V
o
V
IN
V
o
I
K(off)
I
K
V
REF
Figure 1. Test Circuit for VKA=VREF , VO=VKA=VREF
Figure 3. Test Circuit for IK(off)
V
IN
V
o
I
K
R1
R2
I
REF
REF
V
Figure 2. Test Circuit for VKA>VREF
,
VO= VKA= VREF× (1+R1/R2) + IREF × R1
Application schematic
5-Volt Precision Regulator
V
IN
V
o
R
b
27.5k
Ω
0.1%
27.5k
Ω
0.1%
∗ Rb should provide cathode current large than
1mA to maintain APL431 work properly.
Copyright ANPEC Electronics Corp.
4
www.anpec.com.tw
Rev. C.1 - Jun., 2003