Intersil Corporation ICL7662 Datasheet
ICL7662
Data Sheet April 1999
CMOS Voltage Converter
The Intersil ICL7662 is a monolithic high-voltage CMOS
power supply circuit which offers unique performance advantages over previously available devices. The ICL7662
performs supply voltage conversionfrompositivetonegative
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 leveltranslator, fouroutput 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.
File Number
3181.3
Features
• No External Diode Needed Over Entire Temperature
Range
• Pin Compatible With ICL7660
• Simple Conversion of +15V Supply to -15V Supply
• Simple Voltage Multiplication (V
OUT
= (-)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)
TEST
NC
CAP+
NC
GND
NC
CAP-
TOP VIEW
1
2
3
4
5
6
7
14
13
12
11
10
9
8
3-45
V+
OSC
NC
LV
NC
NC
V
OUT
ICL7662CBD AND IBD (SOIC)
TOP VIEW
NC
TEST
NC
CAP+
GND
NC
NC
1
2
3
4
5
6
7
V+
14
13
NC
OSC
12
11
LV
10
NC
9
V
CAP-
8
CAP+
OUT
ICL7662 (CAN)
TEST
1
2
3
GND
TOP VIEW
V+
8
4
OSC
7
LV
6
5
V
OUT
ICL7662 (PDIP)
TOP VIEW
TEST
1
CAP+
2
GND
3
4
CAP-
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
8
V+
OSC
7
LV
6
5
V
OUT
http://www.intersil.com or 407-727-9207
| Copyright © Intersil Corporation 1999
Ordering Information
ICL7662
PART
NUMBER
TEMP. RANGE
(oC) PACKAGE PKG. NO.
ICL7662CTV 0 to 70 8 Pin Metal Can T8.C
ICL7662CPA 0to 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 -40to 85 8 Ld PDIP E8.3
ICL7662IBD -40 to 85 14 Ld SOIC (N) M14.15
ICL7662MTV
-55 to 125 8 Pin Metal Can T8.C
(Note 1)
NOTE:
1. Add /883 to part number if /883B processing is required.
Functional Block Diagram
RC
OSCILLATOR
÷ 2
VOLTAGE
LEVEL
TRANSLATOR
V+
CAP+
CAP-
TEST
P
N
OSC LV
VOLTAGE
REGULATOR
LOGIC
NETWORK
V
OUT
3-46
ICL7662
Absolute Maximum Ratings Thermal Information
Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22V
Oscillator Input Voltage . . . . . . . . -0.3V to (V+ +0.3V) for V+ < 10V
. . . . . . . . . . . . . . . . . (Note 2) (V+ -10V) to (V+ +0.3V) for V+ > 10V
Current Into LV (Note 2). . . . . . . . . . . . . . . . . . . . 20µA for V+ > 10V
Output Short Duration . . . . . . . . . . . . . . . . . . . . . . . . . . .Continuous
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operationofthe
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
2. Connecting any terminal to voltages greater than V+ or less than GND may cause destructive latchup. It is recommended that no inputs from
sources operating from external supplies be applied prior to “power up” of ICL7660S.
3. θJA is measured with the component mounted on an evaluation PC board in free air.
Thermal Resistance (Typical, Note 3) θJA(oC/W) θJC (oC/W)
PDIP Package . . . . . . . . . . . . . . . . . . . 150 N/A
Plastic SOIC Package . . . . . . . . . . . . . 120 N/A
Metal Can. . . . . . . . . . . . . . . . . . . . . . . 156 68
Maximum Lead Temperature (Soldering, 10s). . . . . . . . . . . . .300oC
(SOIC - Lead Tips Only)
Electrical Specifications V+ = 15V, T
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS
Supply Voltage Range - Lo V+L R
Supply Voltage Range - Hi V+H RL = 10kΩ, LV = Open Min < TA < Max 9 - 20 V
Supply Current I+ RL = ∞, LV = Open TA = 25oC - 0.25 0.60 mA
Output Source Resistance R
Supply Current I+ V+ = 5V, RL = ∞,
Output Source Resistance R
Oscillator Frequency FOSC - 10 - kHz
Power Efficiency P
Voltage Conversion Efficiency VoEf RL = ∞ Min < TA < Max 97 99.9 - %
Oscillator Sink or Source
Current
NOTE:
4. Pin 1 is a Test pin and is not connected in normal use. When the TEST pin is connected to V+, an internal transmission gate disconnects any
external parasitic capacitance from the oscillator which would otherwise reduce the oscillator frequency from its nominal value.
EFF
I
OSC
= 25oC, C
A
= 10kΩ, LV = GND Min < TA < Max 4.5 - 11 V
L
IO = 20mA,
O
LV = Open
LV = GND
V+ = 5V, IO = 3mA,
O
LV = GND
RL = 2kΩ TA = 25oC9396-%
V+ = 5V (V
V+ = 15V (V
= 0, Unless Otherwise Specified. Refer to Figure 14.
OSC
0oC < TA < 70oC
-40oC < TA < 85oC
-55oC < TA < 125oC - 0.40 1.0 mA
TA = 25oC - 60 100 Ω
0oC < TA < 70oC
-40oC < TA < 85oC
-55oC < TA < 125oC - 90 150 Ω
TA = 25oC - 20 150 µA
0oC < TA < 70oC
-40oC < TA < 85oC
-55oC < TA < 125oC - 30 250 µA
TA = 25oC - 125 200 Ω
0oC < TA < 70oC
-40oC < TA < 85oC
-55oC < TA < 125oC - 200 350 Ω
Min < TA < Max 90 95 - %
= 0V to +5V) - 0.5 - µA
OSC
= +5V to +15V) - 4.0 - µA
OSC
- 0.30 0.85 mA
- 70 120 Ω
- 25 200 µA
- 150 250 Ω
3-47
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