MC33063A
MC34063A
www.ti.com
SLLS636L –DECEMBER 2004–REVISED DECEMBER 2009
1
8
Q2
S
R
Q
Q1
2
7
6
L
I
R
SC
pk
88 µH
0.24 Ω
C
T
Oscillator
3
V
IN
V
CC
4.5 V to 6.0 V
1N5819
1.25-V
Reference
Regulator
+
+
+
_
100 µF
1500 pF
4
Comparator
5
1.0 µH
R1
953 Ω
V
R2
R1
OUT
V
OUT + *1.25 (1 )
)
−12 V/100 mA
C
R2
8.2 kΩ
100 µF
O
+
1000 µF
+
Optional Filter
Figure 10. Voltage-Inverting Converter
TEST
CONDITIONS
VIN = 4.5 V to 6 V, IO = 100 mA
VIN = 5 V, IO = 10 mA to 100 mA
VIN = 5 V, IO = 100 mA
RESULTS
Line regulation
3 mV ± 0.12%
Load regulation
Output ripple
0.022 V ± 0.09%
500 mVPP
910 mA
Short-circuit current
Efficiency
VIN = 5 V, RL = 0.1 Ω
VIN = 5 V, IO = 100 mA
62.2%
Output ripple with optional filter
VIN = 5 V, IO = 100 mA
70 mVPP
8
8
1
1
VOUT
7
6
7
2
3
2
3
VOUT
VIN
6
VIN
5
5
4
4
a) External NPN Switch
b) External PNP Saturated Switch
Figure 11. External Current-Boost Connections for IC Peak Greater Than 1.5 A
Copyright © 2004–2009, Texas Instruments Incorporated
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9
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