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AMC DOC. #: AMC431_C
AMC431
November
2002
PRECISION ADJUSTABLE SHUNT
VOLTAGE REGULATORS
Copyright
2002, ADD Microtech Corp.
6
www.addmtek.com
APPLICATION INFORMATION
VO = (1 + R1/R2)
×××× V
REF
Note: R should provide 1mA cathode current to the
AMC431 of minimum VBATT
Figure 4. Shunt Regulator
Figure 5. Single –Supply Comparator With
Temperature compensated threshold.
VO = (1 + R1/R2)
×××× V
REF
Figure 6. High-Current Shunt Regulator
Figure 7. Crowbar Circuit
VBATT
R1
0.1%
VREF
Von
≈ 2V
Voff
≈ V
BATT
GND
Vth = 2.5V
Input
VO
VBATT
R2
0.1%
VO
R*
R1
R2
VBATT
AMC431
AMC431
AMC431
AMC431
VBATT
R1
R2
C
VO
VO