Datasheet

5
LTC660
PIN NAME INVERTER DOUBLER
1 BOOST Internal Oscillator Frequency Control Pin. Same
BOOST = Open, f
OSC
= 10kHz typ;
BOOST = V
+
, f
OSC
= 80kHz typ; when OSC is driven
externally BOOST has no effect.
2CAP
+
Positive Terminal for Charge Pump Capacitor Same
3 GND Power Supply Ground Input Positive Voltage Input
4CAP
–
Negative Terminal for Charge Pump Capacitor Same
5V
OUT
Negative Voltage Output Power Supply Ground Input
6 LV Tie LV to GND when the input voltage is less than 3V. LV must be tied to V
OUT
for all input voltages.
LV may be connected to GND or left open for input
voltages above 3V. Connect LV to GND when
overdriving OSC.
7 OSC An external capacitor can be connected to this pin to Same except standard logic levels will not be able to
slow the oscillator frequency. Keep stray capacitance overdrive OSC pin.
to a minimum. An external oscillator can be applied
to this pin to overdrive the internal oscillator.
8V
+
Positive Voltage Input Positive Voltage Output
PIN FUNCTIONS
UUU
TEST CIRCUIT

V
+
LTC660
1
2
3
4
8
7
6
5
C1
150µF
V
+

5V
EXTERNAL
OSCILLATOR
C
OSC
V
OUT
LTC660 • F01
R
L
I
S
I
L
C1
150µF
+
+
Figure 1. Test Circuit