DATASHEET
ICL7660, ICL7660A
CMOS Voltage Converters
The Intersil ICL7660 and ICL7660A are monolithic CMOS
power supply circuits which offer unique performance
advantages over previously available devices. The ICL7660
performs supply voltage conversions from positive to
negative for an input range of +1.5V to +10.0V resulting in
complementary output voltages of -1.5V to -10.0V and the
ICL7660A does the same conversions with an input range of
+1.5V to +12.0V resulting in complementary output voltages
of -1.5V to -12.0V. Only 2 noncritical external capacitors are
needed for the charge pump and charge reservoir functions.
The ICL7660 and ICL7660A can also be connected to
function as voltage doublers and will generate output
voltages up to +18.6V with a +10V input.
Contained on the chip are a series DC supply regulator, RC
oscillator, voltage level translator, and 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 5.0V. 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 (+3.5V to +10.0V for
the ICL7660 and +3.5V to +12.0V for the ICL7660A), the LV
pin is left floating to prevent device latchup.
FN3072
Rev.7.00
Oct 5, 2010
Features
• Simple Conversion of +5V Logic Supply to5V Supplies
• Simple Voltage Multiplication (V
OUT
= (-) nV
IN
)
• Typical Open Circuit Voltage Conversion Efficiency 99.9%
• Typical Power Efficiency 98%
• Wide Operating Voltage Range
- ICL7660 . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5V to 10.0V
- ICL7660A . . . . . . . . . . . . . . . . . . . . . . . . . 1.5V to 12.0V
• ICL7660A 100% Tested at 3V
• Easy to Use - Requires Only 2 External Non-Critical
Passive Components
• No External Diode Over Full Temp. and Voltage Range
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• On Board Negative Supply for Dynamic RAMs
• Localized
Processor
(8080 Type) Negative Supplies
• Inexpensive Negative Supplies
• Data Acquisition Systems
Pinouts
ICL7660, ICL7660A
(8 LD PDIP, SOIC)
TOP VIEW
NC
CAP+
GND
CAP-
1
2
3
4
8
7
6
5
V+
OSC
LV
V
OUT
FN3072 Rev.7.00
Oct 5, 2010
Page 1 of 11
ICL7660, ICL7660A
Ordering Information
PART NUMBER
ICL7660CBA*
ICL7660CBAZ* (See Note)
ICL7660CBAZA* (See Note)
ICL7660CPA
ICL7660CPAZ ( See Note)
ICL7660ACBA*
ICL7660ACBAZA* (See Note)
ICL7660ACPA
ICL7660ACPAZ (See Note)
ICL7660AIBA*
ICL7660AIBAZA* (See Note)
7660CBA
7660CBAZ
7660CBAZ
7660CPA
7660CPAZ
7660ACBA
7660ACBAZ
7660ACPA
7660ACPAZ
7660AIBA
7660AIBAZ
TEMP. RANGE (°C)
0 to 70
0 to 70
0 to 70
0 to 70
0 to 70
0 to 70
0 to 70
0 to 70
0 to 70
-40 to 85
-40 to 85
PACKAGE
8 Ld SOIC (N)
8 Ld SOIC (N) (Pb-free)
8 Ld SOIC (N) (Pb-free)
8 Ld PDIP
8 Ld PDIP** (Pb-free)
8 Ld SOIC (N)
8 Ld SOIC (N) (Pb-free)
8 Ld PDIP
8 Ld PDIP** (Pb-free)
8 Ld SOIC (N)
8 Ld SOIC (N) (Pb-free)
PKG. DWG. #
M8.15
M8.15
M8.15
E8.3
E8.3
M8.15
M8.15
E8.3
E8.3
M8.15
M8.15
*Add “-T” suffix to part number for tape and reel packaging.
**Pb-free PDIPs can be used for through hole wave solder processing only. They are not intended for use in Reflow solder processing applications.
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin
plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are
MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
FN3072 Rev.7.00
Oct 5, 2010
Page 2 of 11
ICL7660, ICL7660A
C
Absolute Maximum Ratings
Supply Voltage
ICL7660 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +10.5V
ICL7660A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +13.0V
LV and OSC Input Voltage . . . . . . -0.3V to (V+ +0.3V) for V+ < 5.5V
(Note 2) . . . . . . . . . . . . . . (V+ -5.5V) to (V+ +0.3V) for V+ > 5.5V
Current into LV (Note 2) . . . . . . . . . . . . . . . . . . . 20A for V+ > 3.5V
Output Short Duration (V
SUPPLY
5.5V)
. . . . . . . . . . . . Continuous
Thermal Information
Thermal Resistance (Typical, Note 1)
JA
(°C/W)
JC
(°C/W)
PDIP Package* . . . . . . . . . . . . . . . . . .
110
N/A
SOIC Package . . . . . . . . . . . . . . . . . . .
160
N/A
Maximum Storage Temperature Range . . . . . . . . . . . -65°C to 150°C
Maximum Lead Temperature (Soldering, 10s). . . . . . . . . . . . . 300°C
(SOIC - Lead Tips Only)
*Pb-free PDIPs can be used for through hole wave solder processing
only. They are not intended for use in Reflow solder processing
applications.
Operating Conditions
Temperature Range
ICL7660C, ICL7660AC. . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
ICL7660AI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to 85°C
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
1.
JA
is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications
ICL7660 and ICL7660A, V+ = 5V, T
A
= 25°C, C
OSC
= 0, Test Circuit Figure 11
Unless Otherwise Specified
ICL7660
PARAMETER
Supply Current
Supply Voltage Range - Lo
Supply Voltage Range - Hi
Output Source Resistance
SYMBOL
I+
V
L
+
V
H
+
R
OUT
R
L
=
MIN
T
A
MAX, R
L
= 10k, LV to GND
MIN
T
A
MAX, R
L
= 10k, LV to Open
I
OUT
= 20mA, T
A
= 25°C
I
OUT
= 20mA, 0°C
T
A
70°C
I
OUT
= 20mA, -55°C
T
A
125°C
I
OUT
= 20mA, -40°C
T
A
85°C
V
+
= 2V, I
OUT
= 3mA, LV to GND
0°C
T
A
70°C
V+ = 2V, I
OUT
= 3mA, LV to GND,
-55°C
T
A
125°C
Oscillator Frequency
Power Efficiency
Voltage Conversion Efficiency
Oscillator Impedance
f
OSC
P
EF
V
OUT EF
Z
OSC
R
L
= 5k
R
L
=
V+ = 2V
V = 5V
V+ = 3V, R
L
=
, 25°C
0°C < T
A
< 70°C
-40°C < T
A
< 85°C
Output Source Resistance
R
OUT
V+ = 3V, I
OUT
= 10mA
0°C < T
A
< 70°C
-40°C < T
A
< 85°C
Oscillator Frequency (Note 3)
f
OSC
V+ = 3V (same as 5V conditions)
0°C < T
A
< 70°C
-40°C < T
A
< 85°C
TEST CONDITIONS
MIN
-
1.5
3.0
-
-
-
-
-
-
-
95
97
-
-
TYP
170
-
-
55
-
-
-
-
-
10
98
99.9
1.0
100
MAX
500
3.5
10.0
100
120
150
-
300
400
-
-
-
-
-
ICL7660A
MIN
-
1.5
3
-
-
-
-
-
-
-
96
99
-
-
TYP
80
-
-
60
-
-
-
-
-
10
98
99.9
1
-
MAX UNITS
165
3.5
12
100
120
-
120
300
-
-
-
-
-
-
A
V
V
kHz
%
%
M
k
ICL7660A, V+ = 3V, T
A
= 25°C, OSC = Free running, Test Circuit Figure 11, Unless Otherwise Specified
Supply Current (Note 3)
I+
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
5.0
3.0
3.0
26
-
-
97
-
-
8
-
-
100
125
125
150
200
200
-
-
-
A
A
A
kHz
kHz
kHz
FN3072 Rev.7.00
Oct 5, 2010
Page 3 of 11
ICL7660, ICL7660A
Electrical Specifications
ICL7660 and ICL7660A, V+ = 5V, T
A
= 25°C, C
OSC
= 0, Test Circuit Figure 11
Unless Otherwise Specified
(Continued)
ICL7660
PARAMETER
Voltage Conversion Efficiency
SYMBOL
TEST CONDITIONS
MIN
-
-
-
-
TYP
-
-
-
-
MAX
-
-
-
-
V
OUT
EFF V+ = 3V, R
L
=
T
MIN
< T
A
< T
MAX
Power Efficiency
P
EFF
V+ = 3V, R
L
= 5k
T
MIN
< T
A
< T
MAX
NOTES:
2. Connecting any input 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 the ICL7660, ICL7660A.
3. Derate linearly above 50°C by 5.5mW/°C.
4. In the test circuit, there is no external capacitor applied to pin 7. However, when the device is plugged into a test socket, there is usually a very
small but finite stray capacitance present, of the order of 5pF.
5. The Intersil ICL7660A can operate without an external diode over the full temperature and voltage range. This device will function in existing
designs which incorporate an external diode with no degradation in overall circuit performance.
ICL7660A
MIN
99
99
96
95
TYP
-
-
-
-
MAX UNITS
-
-
-
-
%
%
%
%
Functional Block Diagram
V+
CAP+
RC
OSCILLATOR
2
VOLTAGE
LEVEL
TRANSLATOR
CAP-
V
OUT
OSC
LV
VOLTAGE
REGULATOR
LOGIC
NETWORK
Typical Performance Curves
10
(Test Circuit of Figure 11)
10K
OUTPUT SOURCE RESISTANCE ()
T
A
= 25
°C
8
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE RANGE
(NO DIODE REQUIRED)
1000
6
4
100
2
0
-55
-25
0
25
50
100
125
10
0
1
2
3
4
5
6
7
8
TEMPERATURE (
°C
)
SUPPLY VOLTAGE (V+)
FIGURE 1. OPERATING VOLTAGE AS A FUNCTION OF
TEMPERATURE
FIGURE 2. OUTPUT SOURCE RESISTANCE AS A FUNCTION
OF SUPPLY VOLTAGE
FN3072 Rev.7.00
Oct 5, 2010
Page 4 of 11
ICL7660, ICL7660A
Typical Performance Curves
350
OUTPUT SOURCE RESISTANCE ()
I
OUT
= 1mA
300
250
200
150
100
50
0
-55
(Test Circuit of Figure 11)
(Continued)
100
98
96
94
92
90
88
86
84
82
V+ = +5V
80
100
I
OUT
= 15mA
POWER CONVERSION EFFICIENCY (%)
T
A
= 25
°C
I
OUT
= 1mA
V+ = +2V
V+ = 5V
-25
0
25
50
75
100
125
1K
OSC. FREQUENCY f
OSC
(Hz)
10K
TEMPERATURE (
°C
)
FIGURE 3. OUTPUT SOURCE RESISTANCE AS A FUNCTION
OF TEMPERATURE
10K
OSCILLATOR FREQUENCY f
OSC
(kHz)
OSCILLATOR FREQUENCY f
OSC
(Hz)
FIGURE 4. POWER CONVERSION EFFICIENCY AS A
FUNCTION OF OSC. FREQUENCY
20
18
16
14
12
10
8
6
-50
V+ = +5V
-25
0
25
50
75
100
125
1K
100
10
1.0
V+ = 5V
T
A
= 25
°C
10
100
C
OSC
(pF)
1000
10K
TEMPERATURE (
°C
)
FIGURE 5. FREQUENCY OF OSCILLATION AS A FUNCTION
OF EXTERNAL OSC. CAPACITANCE
5
4
3
OUTPUT VOLTAGE
2
1
0
-1
-2
-3
-4
-5
0
10
SLOPE 55
20
30
40
50
LOAD CURRENT I
L
(mA)
60
70
80
T
A
= 25
°C
V+ = +5V
FIGURE 6. UNLOADED OSCILLATOR FREQUENCY AS A
FUNCTION OF TEMPERATURE
100
POWER CONVERSION EFFICIENCY (%)
90
80
70
60
50
40
30
20
10
0
0
10
20
30
40
LOAD CURRENT I
L
(mA)
T
A
= 25
°C
V
+
= +5V
50
60
P
EFF
I
+
100
90
80
70
60
50
40
30
20
10
0
SUPPLY CURRENT I+ (mA)
FIGURE 7. OUTPUT VOLTAGE AS A FUNCTION OF OUTPUT
CURRENT
FIGURE 8. SUPPLY CURRENT AND POWER CONVERSION
EFFICIENCY AS A FUNCTION OF LOAD
CURRENT
FN3072 Rev.7.00
Oct 5, 2010
Page 5 of 11
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