P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
TL431/TL431A/TL431B
P
R E C I S I O N P R O G R A M M A B L E R E F E R E N C E S
P R O D U C T I O N D A T A S H E E T
APPLICATION INFORMATION
R (see Note)
VBATT
VO
VBATT
IK
R1 0.1%
TL431/A
& TL431B
VO
TL431/A
& TL431B
VREF
VON 2V
VOFF VBATT
Input
R2 0.1%
GND
R1
R2
VO = 1 +
V
REF
*
Note: R should provide ≥ 1mA cathode current to
the TL431/A & TL1431 at minimum VBATT
.
FIGURE 16 — SHUNT REGULATOR
FIGURE 17 — SINGLE-SUPPLY COMPARATOR WITH
TEMPERATURE-COMPENSATED THRESHOLD
VBATT
VO
VBATT
VO
R1
R1
TL431/A
& TL431B
C
(see Note)
TL431/A
& TL431B
R2
R2
Note: Refer to the stability boundary conditions in
Figure 15 to determine allowable values for C.
R1
R2
VO = 1 +
V
REF
*
FIGURE 18 — HIGH CURRENT SHUNT REGULATOR
FIGURE 19 — CROWBAR CIRCUIT
Copyright © 1999
Rev. 1.3 9/99
11
MICROSEMI [ Microsemi ]
