ILC6660 Datasheet, PDF (1/5 Pages) Impala Linear Corporation – CMOS MONOLITHIC VOLTAGE CONVERTER

Impala Linear Corporation
ILC6660 ^Advance
CMOS Monolithic Voltage Converter
General Description
The ILC6660 monolithic, charge-pump voltage inverter con-
verts 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 com-
bined 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 dou-
ble 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 qui-
escent 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.
Features
• 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.
Applications
• Laptop Computers
• Medical Instruments
• Interface Power Supplies
• Hand-Held Instruments
• Operational-Amplifier Power Supplies
Typical Circuits
+V_IN
1.5V to 5.5V
+
C1
100µF
to 470µF
1
FC
2
CAP+
8
V+
7
SYNC
3
ILC6660
VSS
6
LV
4
CAP-
5
VSH
R_L
VOLTAGE INVERTER
INVERTED
NEGATIVE
VOLTAGE
OUTPUT
C2
100µF
to 470µF
C1
100µF
+
to 470µF
+V_IN
2.5 TO 5.5V
1
FC
2 _CAP+
8
V+
7
SYNC
ILC6660
6
3
VSS
LV
4
CAP-
5
VSH
+ C2
100µF
to 470µF
DOUBLED
POSITIVE
VOLTAGE
OUTPUT
POSITIVE VOLTAGE DOUBLER
Ordering Information* T_A = 40°C to = 85°C
ILC6660IK
8-pin SOIC
1
C1
100µF
2
to 470µF ₊
3
SPLIT
POSITIVE
VOLTAGE
OUTPUT
4
+ _C2
100µF
to 470µF
FC
CAP+
8
V+
7
SYNC
ILC6660
6
VSS
LV
CAP-
5
VSH
POSITIVE VOLTAGE SPLITTER
V_IN
2.5V to 5.5V
Impala Linear Corporation
ILC6660 1.8
[phone] www.impalalinear.com
May 2000 1