MC34063A, MC33063A, SC34063A, SC33063A, NCV33063A
170 m H
L
180
8
7
S Q
R
Q2
Q1
1
2
1N5819
R sc
0.22
I pk
OSC
C T
V in
12 V
+
100
6
V CC
+
-
Comp.
1.25 V
Ref
Reg
3
C T
1500
pF
5
4
1.0 m H
R1
2.2 k
R2
47 k
330
+
C O
V out
28 V/175 mA
+
100
V out
Optional Filter
Test
Line Regulation
Load Regulation
Output Ripple
Efficiency
Output Ripple With Optional Filter
Conditions
V in = 8.0 V to 16 V, I O = 175 mA
V in = 12 V, I O = 75 mA to 175 mA
V in = 12 V, I O = 175 mA
V in = 12 V, I O = 175 mA
V in = 12 V, I O = 175 mA
Results
30 mV = ± 0.05%
10 mV = ± 0.017%
400 mVpp
87.7%
40 mVpp
Figure 9. Step ? Up Converter
http://onsemi.com
5
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