MC34060A, MC33060A
150碌H @ 4.0A
20碌H @ 1.0A
*
V
in
= 8.0V to 26V
MR850
V
out
28V/
0.5A
22k
10
0.05
33k
4.7k
+
2.7M
1
2
3
14
3.9k
13
12
V
CC
+
-
Comp
+
-
V
ref
D
T
4.7k
4
C
T
5
0.001
47k
390
6
470
R
T
MC34060A
E
Gnd
8
7
0.1
300
Tip 111
C
9
50/35V
+
470/
35V
+
*
470/
35V
Test
Line Regulation
Load Regulation
Output Ripple
Efficiency
Conditions
V
in
= 8.0 V to 26 V, I
O
= 0.5 A
V
in
= 12 V, I
O
= 1.0 mA to 0.5 A
V
in
= 12 V, I
O
= 0.5 A
V
in
= 12 V, I
O
= 0.5 A
Results
40 mV 0.14%
5.0 mV 0.18%
24 mV p鈥損 P.A.R.D.
75%
*Optional circuit to minimize output ripple
Figure 20. Step鈥揢p Converter
http://onsemi.com
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