TEST CIRCUITS
VIN
IREF
VREF
VZ = VREF
IZ
VIN
VZ
R1
IREF
IZ
R2
VREF
AMS431
VIN
VZ
IZ OFF
Figure 1. Test Circuit for VZ=VREF
Figure 2. Test Circuit for VREF vs IZ.
Test circuit for IREF.
Figure 3. Test Circuit for Off-State Current
TYPICAL APPLICATIONS
Shunt Regulator
V+
VO
R1
VREF
R2
VO ≈ (1+R1/R2)VREF
Single Supply Comparator with
Temperature Compensated Threshold
V+
IN
VTH ≈ 2.5V
OUT
VON ≈ 2V
VOFF = V+
GND
Series Regulator
V+
30Ω
0.01µF
R1
R2
VO ≈ (1+R1/R2)VREF
Higher Current Shunt Regulator
V+
VO
R1
VO
R1
VO ≈ (1+R1/R2)VREF
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140