MC33063A
MC34063A
SLLS636L –DECEMBER 2004–REVISED DECEMBER 2009
www.ti.com
TYPICAL CHARACTERISTICS (continued)
170 µH
L
1
8
180 Ω
Q2
S
R
Q
1N5819
Q1
2
3
7
6
I
pk
R
SC
0.22 Ω
C
T
V
IN
C
T
V
CC
12 V
1500 pF
1.25-V
Reference
Regulator
+
+
_
100 µF
Comparator
4
5
1.0 µH
100 µF
R2
R2
R1
V
OUT
V
OUT + 1.25 (1 )
)
28 V/175 mA
+
47 kΩ
C
O
330 µF
+
R1
2.2 kΩ
Optional Filter
Figure 6. Step-Up Converter
TEST
CONDITIONS
VIN = 8 V to 16 V, IO = 175 mA
VIN = 12 V, IO = 75 mA to 175 mA
VIN = 12 V, IO = 175 mA
RESULTS
30 mV ± 0.05%
Line regulation
Load regulation
Output ripple
Efficiency
10 mV ± 0.017%
400 mVPP
87.7%
VIN = 12 V, IO = 175 mA
Output ripple with optional filter
VIN = 12 V, IO = 175 mA
40 mVPP
6
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