LTC660 datasheet(5/12 Pages) LINER

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LTC660

NAME

INVERTER

DOUBLER

BOOST

Internal Oscillator Frequency Control Pin.

Same

BOOST = Open, fOSC = 10kHz typ;

BOOST = V +, fOSC = 80kHz typ; when OSC is driven

externally BOOST has no effect.

2CAP +

Positive Terminal for Charge Pump Capacitor

Same

GND

Power Supply Ground Input

Positive Voltage Input

4CAP –

Negative Terminal for Charge Pump Capacitor

Same

5VOUT

Negative Voltage Output

Power Supply Ground Input

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

LV must be tied to VOUT 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.

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

TEST CIRCUIT

V+

LTC660

150

µF

V+

EXTERNAL

OSCILLATOR

COSC

VOUT

LTC660 • F01

150

µF

Figure 1. Test Circuit

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