LTC660 Ver la hoja de datos (PDF) - Linear Technology

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LTC660

100 mA CMOS Voltage Converter

Linear Technology 

PIN FUNCTIONS

PIN

NAME

INVERTER

1

BOOST

Internal Oscillator Frequency Control Pin.

BOOST = Open, fOSC = 10kHz typ;

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

externally BOOST has no effect.

2

CAP +

Positive Terminal for Charge Pump Capacitor

3

GND

Power Supply Ground Input

4

CAP –

Negative Terminal for Charge Pump Capacitor

5

VOUT

6

LV

Negative Voltage Output

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

8

V+

An external capacitor can be connected to this pin to

slow the oscillator frequency. Keep stray capacitance

to a minimum. An external oscillator can be applied

to this pin to overdrive the internal oscillator.

Positive Voltage Input

LTC660

DOUBLER

Same

Same

Positive Voltage Input

Same

Power Supply Ground Input

LV must be tied to VOUT for all input voltages.

Same except standard logic levels will not be able to

overdrive OSC pin.

Positive Voltage Output

TEST CIRCUIT

V+

+ C1

150µF

1

8

2

7

3 LTC660 6

4

5

IS V+

5V

EXTERNAL

OSCILLATOR

COSC

C1

150µF

RL

IL

VOUT

LTC660 • F01

Figure 1. Test Circuit

5

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