CAT660 Ver la hoja de datos (PDF) - Catalyst Semiconductor => Onsemi
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CAT660 Datasheet PDF : 16 Pages
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CAT660
TYPICAL APPLICATIONS
VOLTAGE INVERSION POSITIVE-TO-NEGATIVE
The CAT660 easily provides a negative supply voltage from a positive supply in the system. Figure 7 shows a typical
circuit. The LV pin may be left floating for positive input voltages at or above 3.3V.
NC
+
C1
1
BOOST/FC
8
V+
2
7
CAP+
OSC
3
CAT660 6
GND
LV
4 CAP-
OUT 5
VIN
1.5V to 5.5V
C2 VOUT = -VIN
+
Figure 7: Voltage Inverter
POSITIVE VOLTAGE DOUBLER
The voltage doubler circuit shown in figure 8 gives VOUT = 2 x VIN for input voltages from 2.5V to 5.5V.
1N5817*
VIN
2.5V to 5.5V
1
8
BOOST/FC
V+
2
7
+
+
CAP+
OSC
3
CAT660 6
GND
LV
4
CAP-
5
OUT
*SCHOTTKY DIODE IS FOR START-UP ONLY
Figure 8: Voltage Doubler
VOUT = 2VIN
Doc. No. 5000, Rev. U
10
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