Datasheet

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