Datasheet

NAME
MAX660
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,
f
OSC
= 10kHz typ; FC = V+, f
OSC
= 80kHz typ (40kHz min),
FC has no effect when OSC pin is driven externally.
PIN
V+
OSC
LV
OUT
CAP-
GND
CAP+
FC
Power-Supply Positive Voltage Input8
7
6
5
4
3
Charge-Pump Capacitor, Positive Terminal2
1
120
100
0
2.2 104.7 22 47 100 220
OUTPUT CURRENT vs. CAPACITANCE:
V
IN
= +4.5V, V
OUT
= -4V
20
MAX660 CHART -01
CURRENT (mA)
40
60
80
0.33 1.0 2.0
CAPACITANCE (
µ
F)
FC = V+
OSC = OPEN
250
0
2.2 104.7 22 47 100 220
OUTPUT CURRENT vs. CAPACITANCE:
V
IN
= +4.5V, V
OUT
= -3.5V
50
MAX660 CHART -02
CURRENT (mA)
100
150
200
0.33 1.0 2.0
CAPACITANCE (
µ
F)
FC = V+
OSC = OPEN
60
50
0
2.2 104.7 22 47 100 220
OUTPUT CURRENT vs. CAPACITANCE:
V
IN
= +3.0V, V
OUT
= -2.7V
10
MAX660 CHART -03
CURRENT (mA)
20
30
40
0.33 1.0 2.0
CAPACITANCE (
µ
F)
FC = V+
OSC = OPEN
120
0
2.2 104.7 22 47 100 220
OUTPUT CURRENT vs. CAPACITANCE:
V
IN
= +3.0V, V
OUT
= -2.4V
40
20
MAX660 CHART -04
CURRENT (mA)
60
80
100
0.33 1.0 2.0
CAPACITANCE (
µ
F)
FC = V+
OSC = OPEN
FUNCTION
DOUBLERINVERTER