Datasheet

TL431−Q1
ADJUSTABLE PRECISION SHUNT REGULATOR
SGLS302D − MARCH 2005 − REVISED MARCH 2013
14
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
V
O
TL431
V
I(BATT)
uA7805
IN
OUT
Common
R1
R2
V
O
+
ǒ
1 )
R1
R2
Ǔ
V
ref
Minimum V
O
+ V
ref
) 5V
Figure 20. Output Control of a Three-Terminal Fixed Regulator
V
O
TL431
V
I(BATT)
R1
R2
V
O
+
ǒ
1 )
R1
R2
Ǔ
V
ref
Figure 21. High-Current Shunt Regulator
V
O
TL431
V
I(BATT)
R1
R2
NOTE A: See the stability boundary conditions in Figure 16 to determine allowable values for C.
C
(see Note A)
Figure 22. Crowbar Circuit