1

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FN3181.4

ICL7662

CMOS Voltage Converter

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.

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.

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.

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.

Features

• No External Diode Needed Over Entire Temperature

Range

• Pin Compatible With ICL7660

• Simple Conversion of +15V Supply to -15V Supply

• 99.9% Typical Open Circuit Voltage Conversion

Efficiency

• 96% Typical Power Efficiency

• Wide Operating Voltage Range 4.5V to 20.0V

• Easy to Use - Requires Only 2 External Non-Critical

Passive Components

•

Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

• On Board Negative Supply for Dynamic RAMs

• Localized

µProcessor (8080 Type) Negative Supplies

• Inexpensive Negative Supplies

• Data Acquisition Systems

• Up to -20V for Op Amps

Pinouts

ICL7662CBD-0 (SOIC)

TOP VIEW

ICL7662CBD AND IBD (SOIC)

TOP VIEW

ICL7662 (PDIP)

TOP VIEW

TEST

NC

CAP+

NC

GND

NC

CAP-

V+

OSC

NC

LV

NC

NC

1

2

3

4

5

6

7

14

13

12

11

10

9

8

NC

TEST

NC

CAP+

GND

NC

NC

V+

NC

OSC

LV

NC

CAP-

1

2

3

4

5

6

7

14

13

12

11

10

9

8

TEST

CAP+

GND

CAP-

1

2

3

4

8

7

6

5

V+

OSC

LV

Data Sheet

January 9, 2006

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-352-6832

Copyright Intersil Americas Inc. 2002, 2005, 2006. All Rights Reserved

All other trademarks mentioned are the property of their respective owners.

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