Datasheet

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