NAME

CMOS Monolithic Voltage Converter

_______________________________________________________________________________________

5

______________________________________________________________Pin Description

NAME

Positive Voltage Output

Same as Inverter; however, do not over-

drive OSC in voltage-doubling mode.

LV must be tied to OUT for all input

voltages.

Power-Supply Ground Input

Same as Inverter

Power-Supply Positive Voltage Input

Same as Inverter

Same as Inverter

Oscillator Control Input. OSC is connected to an internal

15pF capacitor. An external capacitor can be added to slow

the oscillator. Take care to minimize stray capacitance. An

external oscillator may also be connected to overdrive OSC.

Low-Voltage Operation Input. Tie LV to GND when input

voltage is less than 3V. Above 3V, LV may be connected to

GND or left open; when overdriving OSC, LV must be

connected to GND.

Output, Negative Voltage

Charge-Pump Capacitor, Negative Terminal

Power-Supply Ground Input

Frequency Control for internal oscillator, FC = open,

FC has no effect when OSC pin is driven externally.

PIN

V+

OSC

LV

OUT

CAP-

GND

CAP+

FC

Power-Supply Positive Voltage Input

8

7

6

5

4

3

Charge-Pump Capacitor, Positive Terminal

2

1

120

100

0

2.2

10

4.7

22 47 100 220

OUTPUT CURRENT vs. CAPACITANCE:

20

40

60

80

0.33 1.0 2.0

CAPACITANCE (

µF)

FC = V+

OSC = OPEN

250

0

2.2

10

4.7

22 47 100 220

OUTPUT CURRENT vs. CAPACITANCE:

50

100

150

200

0.33 1.0 2.0

CAPACITANCE (

µF)

FC = V+

OSC = OPEN

60

50

0

2.2

10

4.7

22 47 100 220

OUTPUT CURRENT vs. CAPACITANCE:

10

20

30

40

0.33 1.0 2.0

CAPACITANCE (

µF)

FC = V+

OSC = OPEN

120

0

2.2

10

4.7

22 47 100 220

OUTPUT CURRENT vs. CAPACITANCE:

40

20

60

80

100

0.33 1.0 2.0

CAPACITANCE (

µF)

FC = V+

OSC = OPEN

FUNCTION

DOUBLER

INVERTER