ICL7662
®
Data Sheet
J anuary 9, 2006
FN3181.4
CMOS Voltage Converter
Features
The Intersil ICL7662 is a monolithic high-voltage CMOS
power supply circuit which offers unique performance ad-
vantages over previously available devices. The ICL7662
performs supply voltage conversion from positive to negative
for an input range of +4.5V to +20.0V, resulting in
complementary output voltages of -4.5V to -20V. Only 2
noncritical external capacitors are needed for the charge
pump and charge reservoir functions. The ICL7662 can also
function as a voltage doubler, and will generate output
voltages up to +38.6V with a +20V input.
• No External Diode Needed Over Entire Temperature
Range
• Pin Compatible With ICL7660
• Simple Conversion of +15V Supply to -15V Supply
• Simple Voltage Multiplication (V
= (-)nV )
IN
OUT
• 99.9% Typical Open Circuit Voltage Conversion
Efficiency
• 96% Typical Power Efficiency
• Wide Operating Voltage Range 4.5V to 20.0V
Contained on chip are a series DC power supply regulator,
RC oscillator, voltage level translator, four output power
MOS switches. A unique logic element senses the most
negative voltage in the device and ensures that the output N-
Channel switch source-substrate junctions are not forward
biased. This assures latchup free operation.
• Easy to Use - Requires Only 2 External Non-Critical
Passive Components
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
The oscillator, when unloaded, oscillates at a nominal
frequency of 10kHz for an input supply voltage of 15.0V.
This frequency can be lowered by the addition of an external
capacitor to the “OSC” terminal, or the oscillator may be
overdriven by an external clock.
• On Board Negative Supply for Dynamic RAMs
• Localized µProcessor (8080 Type) Negative Supplies
• Inexpensive Negative Supplies
• Data Acquisition Systems
The “LV” terminal may be tied to GROUND to bypass the
internal series regulator and improve low voltage (LV)
operation. At medium to high voltages (+10V to +20V), the
LV pin is left floating to prevent device latchup.
• Up to -20V for Op Amps
Pinouts
ICL7662CBD-0 (SOIC)
ICL7662CBD AND IBD (SOIC)
TOP VIEW
TOP VIEW
TEST
NC
1
2
3
4
5
6
7
14 V+
13 OSC
12 NC
11 LV
NC
TEST
NC
1
2
3
4
5
6
7
14 V+
13 NC
12 OSC
11 LV
CAP+
NC
CAP+
GND
NC
GND
NC
10 NC
10 NC
9
8
NC
V
9
8
V
OUT
CAP-
CAP-
NC
OUT
ICL7662 (PDIP)
TOP VIEW
TEST
CAP+
GND
1
8
7
6
5
V+
2
3
4
OSC
LV
CAP-
V
OUT
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1
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