5

LTC660

PIN

NAME

INVERTER

DOUBLER

1

BOOST

Internal Oscillator Frequency Control Pin.

Same

externally BOOST has no effect.

Positive Terminal for Charge Pump Capacitor

Same

3

GND

Power Supply Ground Input

Positive Voltage Input

Negative Terminal for Charge Pump Capacitor

Same

Negative Voltage Output

Power Supply Ground Input

6

LV

Tie LV to GND when the input voltage is less than 3V.

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.

Positive Voltage Input

Positive Voltage Output

TEST CIRCUIT

LTC660

1

2

3

4

8

7

6

5

C1

150

µF

5V

EXTERNAL

OSCILLATOR

LTC660 • F01

C1

150

µF

+

Figure 1. Test Circuit