®
ICL7660S
Data Sheet
September 6, 2005
FN3179.4
Super Voltage Converter
The ICL7660S Super Voltage Converter is a monolithic
CMOS voltage conversion IC that guarantees significant
performance advantages over other similar devices. It is a
direct replacement for the industry standard ICL7660 offering
an
extended
operating supply voltage range up to 12V, with
lower
supply current.
No external diode
is needed for the
ICL7660S. In addition, a
Frequency Boost pin
has been
incorporated to enable the user to achieve lower output
impedance despite using smaller capacitors. All
improvements are highlighted in the Electrical Specifications
section.
Critical parameters are guaranteed over the entire
commercial, industrial and military temperature ranges.
The ICL7660S performs supply voltage conversion from
positive to negative for an input range of 1.5V to 12V,
resulting in complementary output voltages of -1.5V to -12V.
Only 2 non-critical external capacitors are needed for the
charge pump and charge reservoir functions. The ICL7660S
can be connected to function as a voltage doubler and will
generate up to 22.8V with a 12V input. It can also be used as
a voltage multiplier or voltage divider.
The chip contains a series DC power supply regulator, RC
oscillator, voltage level translator, and four output power
MOS switches. 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 over-driven by an external clock.
The “LV” terminal may be tied to GND to bypass the internal
series regulator and improve low voltage (LV) operation. At
medium to high voltages (3.5V to 12V), the LV pin is left
floating to prevent device latchup.
Features
• Guaranteed Lower Max Supply Current for All
Temperature Ranges
• Wide Operating Voltage Range 1.5V to 12V
• 100% Tested at 3V
• No External Diode Over Full Temperature and Voltage
Range
• Boost Pin (Pin 1) for Higher Switching Frequency
• Guaranteed Minimum Power Efficiency of 96%
• Improved Minimum Open Circuit Voltage Conversion
Efficiency of 99%
• Improved SCR Latchup Protection
• Simple Conversion of +5V Logic Supply to
±5V
Supplies
• Simple Voltage Multiplication V
OUT
= (-)nV
IN
• Easy to Use - Requires Only 2 External Non-Critical
Passive Components
• Improved Direct Replacement for Industry Standard
ICL7660 and Other Second Source Devices
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• Simple Conversion of +5V to
±5V
Supplies
• Voltage Multiplication V
OUT
=
±nV
IN
• Negative Supplies for Data Acquisition Systems and
Instrumentation
• RS232 Power Supplies
• Supply Splitter, V
OUT
=
±V
S
/2
Pinout
ICL7660S (PDIP, SOIC)
TOP VIEW
BOOST
CAP+
GND
CAP-
1
2
3
4
8
7
6
5
V+
OSC
LV
V
OUT
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or1-888-468-3774
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2004, 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
ICL7660S
Ordering Information
PART NUMBER
ICL7660SCBA
ICL7660SCBA-T
ICL7660SCBAZ
(Note 1)
PART
MARKING
7660SCBA
7660SCBA
7660SCBAZ
TEMP.
RANGE (°C)
0 to 70
0 to 70
PACKAGE
PKG.
DWG. #
8 Ld SOIC (N) M8.15
8 Ld SOIC (N) M8.15
(Pb-free)
8 Ld SOIC (N) Tape and Reel M8.15
ICL7660SCBAZ-T 7660SCBAZ
(Note 1)
ICL7660SCPA
ICL7660SCPAZ
(Note 1)
ICL7660SIBA
ICL7660SIBAT
ICL7660SIBAZ
(Note 1)
ICL7660SIBAZT
(Note 1)
ICL7660SIPA
ICL7660SIPAZ
(Note 1)
7660SCPA
7660SCPAZ
7660SIBA
7660SIBA
7660SIBAZ
7660SIBAZ
7660SIPA
7660SIPAZ
8 Ld SOIC (N) Tape and Reel M8.15
(Pb-free)
0 to 70
0 to 70
-40 to 85
8 Ld PDIP
8 Ld PDIP*
(Pb-free)
E8.3
E8.3
8 Ld SOIC (N) M8.15
M8.15
8 Ld SOIC (N)
Tape and Reel
-40 to 85
8 Ld SOIC (N) M8.15
(Pb-free)
M8.15
E8.3
E8.3
8 Ld SOIC (N) (Pb-free)
Tape and Reel
-40 to 85
-40 to 85
8 Ld PDIP
8 Ld PDIP*
(Pb-free)
*Pb-free PDIPs can be used for through hole wave solder processing
only. They are not intended for use in Reflow solder processing.
applications.
NOTES:
1. 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.
2. Add /883B to part number if 883B processing is required.
2
FN3179.4
September 6, 2005
ICL7660S
Absolute Maximum Ratings
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +13.0V
LV and OSC Input Voltage (Note 3)
V+ < 5.5V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to V+ + 0.3V
V+ > 5.5V . . . . . . . . . . . . . . . . . . . . . . . . . . . V+ -5.5V to V+ +0.3V
Current into LV (Note 3)
V+ > 3.5V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20µA
Output Short Duration
V
SUPPLY
≤
5.5V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
Storage Temperature Range . . . . . . . . . . . . . . . . . . .-65°C to 150°C
Thermal Information
Thermal Resistance (Typical, Note 4)
θ
JA
(°C/W)
θ
JC
(°C/W)
PDIP* . . . . . . . . . . . . . . . . . . . . . . . . . .
110
N/A
Plastic SOIC. . . . . . . . . . . . . . . . . . . . .
160
N/A
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
ICL7660SI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to 85°C
ICL7660SC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°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.
NOTES:
3. 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.
4.
θ
JA
is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications
PARAMETER
Supply Current (Note 7)
V+ = 5V, T
A
= 25°C, OSC = Free running, Test Circuit Figure 12, Unless Otherwise Specified
SYMBOL
I+
TEST CONDITIONS
R
L
=
∞
, 25°C
0°C < T
A
< +70°C
-40°C < T
A
< 85°C
-55°C < T
A
< 125°C
MIN
-
-
-
-
3.0
1.5
-
-
-
-
-
-
-
5
-
96
95
99
TYP
80
-
-
-
-
-
60
-
-
-
-
-
-
10
35
98
97
99.9
MAX
160
180
180
200
12
3.5
100
120
120
150
250
300
400
-
-
-
-
-
UNITS
µA
µA
µA
µA
V
V
Ω
Ω
Ω
Ω
Ω
Ω
Ω
kHz
kHz
%
-
%
Supply Voltage Range - High
(Note 8)
Supply Voltage Range - Low
Output Source Resistance
V+
H
V+
L
R
OUT
R
L
= 10K, LV Open, T
MIN
< T
A
< T
MAX
R
L
= 10K, LV to GND, T
MIN
< T
A
< T
MAX
I
OUT
= 20mA
I
OUT
= 20mA, 0°C < T
A
< 70°C
I
OUT
= 20mA, -25°C < T
A
< 85°C
I
OUT
= 20mA, -55°C < T
A
< 125°C
I
OUT
= 3mA, V+ = 2V, LV = GND,
0°C < T
A
< 70°C
I
OUT
= 3mA, V+ = 2V, LV = GND,
-40°C < T
A
< 85°C
I
OUT
= 3mA, V+ = 2V, LV = GND,
-55°C < T
A
< 125°C
Oscillator Frequency (Note 7)
f
OSC
C
OSC
= 0, Pin 1 Open or GND
C
OSC
= 0, Pin 1 = V+
Power Efficiency
P
EFF
R
L
= 5kΩ
T
MIN
< T
A
< T
MAX
R
L
= 5kΩ
Voltage Conversion Efficiency
V
OUT
EFF
R
L
=
∞
3
FN3179.4
September 6, 2005
ICL7660S
Electrical Specifications
PARAMETER
Oscillator Impedance
V+ = 5V, T
A
= 25°C, OSC = Free running, Test Circuit Figure 12, Unless Otherwise Specified
(Continued)
SYMBOL
Z
OSC
V+ = 2V
V+ = 5V
NOTES:
5. Derate linearly above 50°C by 5.5mW/°C
6. 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.
7. The Intersil ICL7660S 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.
8. All significant improvements over the industry standard ICL7660 are highlighted.
TEST CONDITIONS
MIN
-
-
TYP
1
100
MAX
-
-
UNITS
MΩ
kΩ
Typical Performance Curves
12
10
SUPPLY VOLTAGE (V)
8
6
4
2
0
-55
-25
0
25
(Test Circuit Figure 12)
250
OUTPUT SOURCE RESISTANCE (Ω)
T
A
= 125°C
200
T
A
= 25°C
150
T
A
= -55°C
100
SUPPLY VOLTAGE RANGE
(NO DIODE REQUIRED)
50
0
50
100
125
0
2
TEMPERATURE (
°C
)
4
6
8
SUPPLY VOLTAGE (V)
10
12
FIGURE 1. OPERATING VOLTAGE AS A
FUNCTION OF TEMPERATURE
FIGURE 2. OUTPUT SOURCE RESISTANCE AS A
FUNCTION OF SUPPLY VOLTAGE
350
POWER CONVERSION EFFICIENCY (%)
OUTPUT SOURCE RESISTANCE (Ω)
300
250
I
OUT
= 3mA,
200
150
100
50
0
-50
-25
0
25
I
OUT
= 20mA,
V+ = 5V
V+ = 2V
98
96
94
92
90
88
86
84
82
80
100
V+ = 5V
T
A
= 25°C
I
OUT
= 1mA
I
OUT
= 20mA,
V+ = 5V
I
OUT
= 20mA,
V+ = 12V
50
75
100
125
1k
10k
50k
TEMPERATURE (°C)
OSC FREQUENCY F
OSC
(Hz)
FIGURE 3. OUTPUT SOURCE RESISTANCE AS A
FUNCTION OF TEMPERATURE
FIGURE 4. POWER CONVERSION EFFICIENCY AS A
FUNCTION OF OSCILLATOR FREQUENCY
4
FN3179.4
September 6, 2005
ICL7660S
Typical Performance Curves
10
OSCILLATOR FREQUENCY f
OSC
(kHz)
9
8
7
6
5
4
3
2
1
0
1
10
C
OSC
(pF)
100
1k
OSCILLATOR FREQUENCY f
OSC
(kHz)
V+ = 5V
T
A
= 25°C
(Test Circuit Figure 12)
(Continued)
20
18
16
14
V+ = 10V
12
10
V+ = 5V
8
-55
-25
0
25
50
75
100
125
TEMPERATURE (°C)
FIGURE 5. FREQUENCY OF OSCILLATION AS A FUNCTION
OF EXTERNAL OSCILLATOR CAPACITANCE
FIGURE 6. UNLOADED OSCILLATOR FREQUENCY AS A
FUNCTION OF TEMPERATURE
1
V+ = 5V
0
OUTPUT VOLTAGE (V)
T
A
= 25°C
POWER CONVERSION EFFICIENCY (%)
100
90
80
70
60
50
40
30
20
10
0
0
10
20
30
V+ = 5V
T
A
= 25°C
100
90
SUPPLY CURRENT (mA)
SUPPLY CURRENT (mA) (NOTE 9)
80
70
60
50
40
30
20
10
0
40
50
60
LOAD CURRENT (mA)
-1
-2
-3
-4
-5
0
10
20
30
LOAD CURRENT (mA)
40
FIGURE 7. OUTPUT VOLTAGE AS A FUNCTION
OF OUTPUT CURRENT
FIGURE 8. SUPPLY CURRENT AND POWER CONVERSION
EFFICIENCY AS A FUNCTION OF LOAD
CURRENT
2
V+ = 2V
T
A
= 25°C
OUTPUT VOLTAGE (V)
POWER CONVERSION
EFFICIENCY (%)
1
100
90
80
70
60
50
40
30
20
10
V+ = 2V
T
A
= 25°C
16
14
12
10
8
6
4
2
0
0
1.5
3
4.5
6
7.5
LOAD CURRENT (mA)
9
0
-1
-2
0
1
2
3
4
5
6
7
8
9
LOAD CURRENT (mA)
0
FIGURE 9. OUTPUT VOLTAGE AS A FUNCTION OF OUTPUT
CURRENT
FIGURE 10. SUPPLY CURRENT AND POWER CONVERSION
EFFICIENCY AS A FUNCTION OF LOAD CURRENT
FN3179.4
September 6, 2005
5
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