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