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CAT661ESA Datasheet(PDF) 12 Page - Catalyst Semiconductor

No. de pieza CAT661ESA
Descripción Electrónicos  High Frequency 100mA CMOS Charge Pump, Inverter/Doubler
PDF  16 Pages
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Fabricante Electrónico  CATALYST [Catalyst Semiconductor]
Página de inicio  http://www.catalyst-semiconductor.com
Logo CATALYST - Catalyst Semiconductor

CAT661ESA Datasheet(HTML) 12 Page - Catalyst Semiconductor

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CAT661
12
Doc. No. 5003, Rev. J
BATTERY VOLTAGE SPLITTER
Positive and negative voltages that track each other can be obtained from a battery. Figure 11 shows how a 9V battery
can provide symmetrical positive and negative voltages equal to one-half the battery voltage.
CASCADE OPERATION FOR HIGHER NEGATIVE VOLTAGES
The CAT661 can be cascaded as shown in figure 12 to generate more negative voltage levels. The output resistance
is approximately the sum of the individual CAT661 output resistance.
VOUT= -N x VIN, where N represents the number of cascaded devices.
Figure 11: Battery Splitter
Figure 12: Cascading to Increase Output Voltage
+
-
(-4.5V)
1
2
3
4
8
7
6
5
CAT661
+
BOOST/FC
CAP+
GND
CAP-
V+
OSC
LV
OUT
+
(4.5V)
3V < VBAT < 11V
VBAT
9V
BATTERY
VBAT
2
VBAT
2
+
C2
2
3
4
8
5
CAT661
"1"
+
C1
+
CAT661
"N"
2
3
4
8
5
C1N
+VIN
+
C2
VOUT = -NVIN



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