TL431_11 Datasheet, PDF (30/79 Pages) Fairchild Semiconductor – Programmable Shunt Regulator

TL431, TL431A, TL431B
TL432, TL432A, TL432B
SLVS543L – AUGUST 2004 – REVISED FEBRUARY 2011
V_I(BATT)
IN
OUT
LM317
8.2 kΩ
Adjust
V_O ≈5 V, 1.5 A
243 Ω
0.1%
TL431
243 Ω
0.1%
Figure 23. Precision 5-V, 1.5-A Regulator
V_I(BATT)
R_b
(see Note A)
TL431
V_O ≈5 V
27.4 kΩ
0.1%
27.4 kΩ
0.1%
A. R_b should provide cathode current ≥1 mA to the TL431.
Figure 24. Efficient 5-V Precision Regulator
12 V
TL431
6.8 kΩ
5V
10 kΩ
10 kΩ
0.1%
10 kΩ
0.1%
X
Not
Used
V_CC
−
+
TL598
Feedback
Figure 25. PWM Converter With Reference
www.ti.com
30
Submit Documentation Feedback
Copyright © 2004–2011, Texas Instruments Incorporated
Product Folder Link(s): TL431 TL431A TL431B TL432 TL432A TL432B