AIC1660 Datasheet, PDF (6/8 Pages) Analog Intergrations Corporation – Switched-Capacitor Voltage Converter

n APPLICATION EXAMPLES
10µF ⁺
C1
VIN (1.5V to 6V)
1
8
2
7
AIC1660
3
6
Required for
VIN≤3V
4
5
VOUT =-VIN
10µF
+ C2
Fig. 8 Negative Voltage Converter
AIC1660
Fig. 8 shows a typical connection, which will
provide a negative supply from an available
positive supply without the need of any external
diodes. The LV pin should be connect to ground
for V_IN≤3V, or may be “floated“ for V_IN>3V
VIN (1.5V to 6V) ^1N4148
R1
220Ω
+
C1
10µF
1
8
2
7
AIC1660
3
6
4
5
IOUT
VOUT=2VIN
+ ^{(3V to 12V)}
C2
10µF
R2 _470K
Fig. 9 shows a method of voltage doubling.
Voltage doubling is achieved by simply
rearranging the connection of the two external
capacitors. An external 470KΩ resistor is
required to ensure the oscillator will start.
Fig. 9 Voltage Doubling
+
10µF ^C1
(3 to 12V)
V_{I N}
1
8
2
7
AIC1660
3
6
4
5
VOUT =VIN/2 ± 0.002%
T_MIN≤T_A≤T_MAX
I_L<100nA
+
C2
Required for V_IN≤3V
10 µF
Fig. 10 Ultra Precision Voltage Divider
An ultra precision voltage divider is shown in Fig.
10. To achieve the 0.002% accuracy as indicated,
the load current should be kept below 100nA.
However, with a slight loss in accuracy, the load
current can be increased.
6