CM431 Datasheet, PDF (7/12 Pages) List of Unclassifed Manufacturers – LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR

CM431
LOW VOLTAGE ADJUSTABLE SHUNT REGULATOR
APPLICATION INFORMATION
VB_BATTB
R*
R1
0.1%
V_REF B
B
R2
0.1%
V_OB
B
CM431
V_OB
B
=
(1
+
R1/R2)
×
VB_REF
Note: R should provide 1mA cathode current to the
CM431 of minimum VB_BATT
Figure 4. Shunt Regulator
VB_BATTB
Input
CM431
V_thB
B
=
2.5V
V_OB
B
V_on B
B
≈
2V
V ≈ V _off B
B
B_BATTB
GND
Figure 5. Single –Supply Comparator With Temperature
compensated threshold.
VB_BATTB
V_OB
B
VB_BATTB
R1
R1
R2 ^CM431
R2
V_OB
B
CM431
C
V_OB
B
=
(1
+
R1/R2)
×
VB_REF
Figure 6. High-Current Shunt Regulator
Figure 7. Crowbar Circuit
2006/10/11 Rev.1.4
Champion Microelectronic Corporation
Page 7