Datasheet

TL431
12 V
V
CC
5 V
6.8 kΩ
10 kΩ
10 kΩ
0.1%
10 kΩ
0.1%
X
Not
Used
Feedback
TL598
+
−
V
O
≈5 V
TL431
V
I(BATT)
27.4 kΩ
0.1%
R
b
(see Note A)
27.4 kΩ
0.1%
V
O
≈5 V, 1.5 A
TL431
V
I(BATT)
LM317
IN OUT
Adjust
243 Ω
0.1%
243 Ω
0.1%
8.2 kΩ
TL431, TL431A, TL431B
TL432, TL432A, TL432B
SLVS543M –AUGUST 2004–REVISED JULY 2012 www.ti.com
Figure 26. Precision 5-V, 1.5-A Regulator
A. R
b
should provide cathode current ≥1 mA to the TL431.
Figure 27. Efficient 5-V Precision Regulator
Figure 28. PWM Converter With Reference
30 Submit Documentation Feedback Copyright © 2004–2012, Texas Instruments Incorporated
Product Folder Link(s): TL431 TL431A TL431B TL432 TL432A TL432B