CAT661(2012) 데이터 시트보기 (PDF) - ON Semiconductor
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CAT661 Datasheet PDF : 14 Pages
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CAT661
Typical Applications
Voltage Inversion Positive−to−Negative
The CAT661 easily provides a negative supply voltage from a positive supply in the system. Figure 24 shows a typical circuit.
The LV pin may be left floating for positive input voltages at or above 3.3 V.
NC
+
C1
CAT661
1
BOOST/FC
2
CAP+
3
GND
4
CAP−
V+ 8
7
OSC
6
LV
OUT 5
VIN
1.5 V to 5.5 V
C2
+
VOUT = −VIN
Figure 24. Voltage Inverter
Positive Voltage Doubler
The voltage doubler circuit shown in Figure 25 gives VOUT = 2 x VIN for input voltages from 2.5 V to 5.5 V.
1N5817*
VIN
2.5 V to 5.5 V
C1 +
150 mF
CAT661
1
BOOST/FC
2
CAP+
3
GND
4
CAP−
8
V+
7
OSC
6
LV
5
OUT
*SCHOTTKY DIODE IS FOR START−UP ONLY
Figure 25. Voltage Doubler
VOUT = 2VIN
+
C2
150 mF
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