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Intersil Electronic Components Datasheet



ICL7662

CMOS VOLTAGE CONVERTERS



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ICL7662 pdf
Data Sheet
ICL7662
April 1999 File Number 3181.3
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
• Simple Voltage Multiplication (VOUT = (-)nVIN)
• 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
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
TEST 1
NC 2
CAP+ 3
NC 4
GND 5
NC 6
CAP- 7
14 V+
13 OSC
12 NC
11 LV
10 NC
9 NC
8 VOUT
ICL7662CBD AND IBD (SOIC)
TOP VIEW
NC 1
TEST 2
NC 3
CAP+ 4
GND 5
NC 6
NC 7
14 V+
13 NC
12 OSC
11 LV
10 NC
9 VOUT
8 CAP-
ICL7662 (CAN)
TOP VIEW
V+
TEST 1
8
7 OSC
CAP+ 2
6 LV
GND 3
5 VOUT
4
ICL7662 (PDIP)
TOP VIEW
TEST 1
CAP+ 2
GND 3
CAP- 4
8 V+
7 OSC
6 LV
5 VOUT
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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999



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ICL7662 pdf
ICL7662
Ordering Information
PART
TEMP. RANGE
NUMBER (oC) PACKAGE
PKG. NO.
ICL7662CTV
0 to 70 8 Pin Metal Can T8.C
ICL7662CPA
0 to 70 8 Ld PDIP
E8.3
ICL7662CBD-0
0 to 70 14 Ld SOIC (N) M14.15
ICL7662CBD
0 to 70 14 Ld SOIC (N) M14.15
ICL7662ITV
-40 to 85 8 Pin Metal Can T8.C
ICL7662IPA
-40 to 85 8 Ld PDIP
E8.3
ICL7662IBD
-40 to 85 14 Ld SOIC (N) M14.15
ICL7662MTV
(Note 1)
-55 to 125 8 Pin Metal Can T8.C
NOTE:
1. Add /883 to part number if /883B processing is required.
Functional Block Diagram
TEST
RC
OSCILLATOR
P
N
OSC
LV
VOLTAGE
REGULATOR
÷2
VOLTAGE
LEVEL
TRANSLATOR
V+
CAP+
CAP-
VOUT
LOGIC
NETWORK
3-46



Part Number ICL7662
Description CMOS VOLTAGE CONVERTERS
Maker Intersil - Intersil
Total Page 10 Pages
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