Impala Linear Corporation ILC6660IK Datasheet
Ordering Information* TA= 40°C to = 85°C
ILC6660IK 8-pin SOIC
The ILC6660 monolithic, charge-pump voltage inverter converts a +1.5V to +5.5V input to a corresponding -1.5V to -5.5V
output. Using only two low-cost capacitors, the charge pump's
100mA output replaces switching regulators, eliminating
inductors and their associated cost, size, and EMI. Greater
than 90% efficiency over most of its load-current range combined with a typical operating current of only 120µA provides
ideal performance for both battery-powered and board-level
voltage conversion applications. The ILC6660 can also double or split the output voltage of an input powered supply or
battery, providing +9.5V or +2.3V at 100mA from a +5V input.
A frequency control (FC) pin selects either 5kHz typ or 50kHz
typ (30kHz min) operation to optimize capacitor size and quiescent current. The Oscillator frequency can also be driven
with an external clock. The ILC6660 is available in both 8-pin
DIP and small-outline packages in commercial and extended
temperature ranges.
ILC6660
CMOS Monolithic Voltage Converter
Impala Linear Cor poration
Impala Linear Corporation
1
(408) 574-3939
www.impalalinear.com
May 2000
ILC6660 1.8
Advance
+
INVERTED
NEGATIVE
VOLTAGE
OUTPUT
1
2
3
4
8
7
6
5
FC
CAP+
ILC6660
VSS
CAP-
+V
IN
1.5V to 5.5V
SYNC
LV
VSH
VOLTAGE INVERTER
V+
C2
100µF
to 470µF
C1
100µF
to 470µF
R
L
• 0.5V Typ Loss at 100mA Load
• Low 120µA Operating Current
• 5.0Ω Typ Output Impedance
• Guaranteed R
OUT
< 10Ω for C1 = C2 = 100µF
• Inverts, Doubles or Splits Input Supply Voltage
• Selectable Oscillator Frequency: 5kHz/50kHz
• 90% Typ Conversion Efficiency at 100mA l
OUT
• 8-pin SOIC package.
• Laptop Computers
• Medical Instruments
• Interface Power Supplies
• Hand-Held Instruments
• Operational-Amplifier Power Supplies
+V
IN
2.5 TO 5.5V
100µF
to 470µF
C1
+
DOUBLED
POSITIVE
VOLTAGE
OUTPUT
1
2
3
4
8
7
6
5
FC
CAP+
ILC6660
VSS
CAP-
SYNC
LV
VSH
POSITIVE VOLTAGE DOUBLER
V+
+
C2
100µF
to 470µF
General Description
Features
Applications
Typical Circuits
+
SPLIT
POSITIVE
VOLTAGE
OUTPUT
1
2
3
4
8
7
6
5
FC
CAP+
ILC6660
VSS
CAP-
V
IN
2.5V to 5.5V
SYNC
LV
VSH
POSITIVE VOLTAGE SPLITTER
V+
C1
100µF
to 470µF
C2
100µF
to 470µF
+
CMOS Monolithic Voltage Converter
Impala Linear Corporation
2
(408) 574-3939
www.impalalinear.com
May 2000
ILC6660 1.8
Advance
1
2
3
4
8
7
6
5
FC
CAP+
VSS
CAP-
VSH
LV
SYNC
V+
SOIC
ILC6660
Pin-Package Configurations
Pin Functions ILC6660
Pin
Number
Pin
Name
Inverter
Splitter
Doubler
1
FC
Frequency Control for Internal Oscillator,
FC open, f
OSC
=5kHz typ; FC = V+, f
OSC
=
50kHz typ.
FC has no effect when SYNC pin is driven
externally.
Same as Inverter
Same as Inverter
2
CAP+
Charge-Pump Capacitor, Positive Terminal
Same as Inverter
Same as Inverter
3
VSS
Power-Supply Ground Input
Power-Supply
PositiveVoltage Output
Power-Supply
Positive Voltage Input
4
CAP-
Charge-Pump Capacitor, Negative Terminal
Same as Inverter
Same as Inverter
5
VSH
Output, Negative Voltage
Power-Supply Ground
Input
Power-Supply Ground
Input
6
LV
Low-Voltage Operation Input. Tie LV to VSS
when input voltage is less than 2V. Above
2V, LV must be left open.
LV must be left open for
all input voltages
LV must be left open
for all input voltages.
7
SYNC
Oscillator Control Input. SYNC is connected
to an internal 15pF capacitor. An external
Oscillator may be connected to overdrive
SYNC via a 2…5nF capacitor.
SYNC shall not be connected to ground.
Same as inverter,
however, do not use
SYNC in voltagesplitting mode
Same as inverter,
however, do not use
SYNC in voltagedoubling mode.
8
V+
Power-Supply Positive Voltage Input
Positive Voltage Input
Positive Voltage
Output
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