CM431
L
OW
V
OLTAGE
A
DJUSTABLE
S
HUNT
R
EGULATOR
APPLICATION INFORMATION
V
BATT
B
B
R*
V
O
B
B
V
BATT
B
B
R1
0.1%
V
REF
B
B
CM431
CM431
Input
V
th
= 2.5V
B
B
B
V
O
B
B
R2
0.1%
V
on
≈
2V
V
off
≈
V
BATT
B
B
B
B
B
GND
V
O
= (1 + R1/R2)
×
V
REF
B
B
B
Note: R should provide 1mA cathode current to the
CM431 of minimum V
BATT
B
Figure 4. Shunt Regulator
Figure 5. Single –Supply Comparator With Temperature
compensated threshold.
V
BATT
B
B
V
O
B
B
V
BATT
B
B
V
O
B
B
R1
R1
CM431
R2
C
R2
CM431
V
O
= (1 + R1/R2)
×
V
REF
B
B
B
Figure 6. High-Current Shunt Regulator
Figure 7.
Crowbar Circuit
2006/10/11
Rev.1.4
Champion Microelectronic Corporation
Page 7