TL431, A, B Series, NCV431A
150 mH @ 2.0 A
V
in
= 10 V to 20 V
TIP115
V
= 5.0 V
= 1.0 A
out
I
out
1.0 k
1N5823
4.7 k
4.7 k
100 k
MPSA20
4.7 k
0.01mF
+
2200 mF
+
470 mF
0.1 mF
2.2 k
10
51 k
Figure 30. High Efficiency Step−Down Switching Converter
Test
Conditions
= 10 V to 20 V, I = 1.0 A
Results
53 mV (1.1%)
25 mV (0.5%)
50 mVpp P.A.R.D.
100 mVpp P.A.R.D.
82%
Line Regulation
Load Regulation
Output Ripple
Output Ripple
Efficiency
V
in
V
in
V
in
V
in
V
in
o
= 15 V, I = 0 A to 1.0 A
o
= 10 V, I = 1.0 A
o
= 20 V, I = 1.0 A
o
= 15 V, I = 1.0 A
o
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