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PDF 7660CBA Data sheet ( Hoja de datos )

Número de pieza 7660CBA
Descripción CMOS Voltage Converters
Fabricantes Intersil Corporation 
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®
Data Sheet
ICL7660, ICL7660A
October 10, 2005
FN3072.7
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
www.DataSheoeft-41U..5cVomto -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.
Pinouts
ICL7660, ICL7660A
(8 LD PDIP, SOIC)
TOP VIEW
NC 1
CAP+ 2
GND 3
CAP- 4
8 V+
7 OSC
6 LV
5 VOUT
Features
• Simple Conversion of +5V Logic Supply to ±5V Supplies
• Simple Voltage Multiplication (VOUT = (-) nVIN)
• 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 µProcessor (8080 Type) Negative Supplies
• Inexpensive Negative Supplies
• Data Acquisition Systems
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 1999-2004, 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

1 page




7660CBA pdf
ICL7660, ICL7660A
Typical Performance Curves (Test Circuit of Figure 11) (Continued)
350
300
250
200
150
100
50
www.DataSheet4U.c0om
-55
-25
IOUT = 1mA
V+ = +2V
V+ = 5V
0 25 50 75
TEMPERATURE (°C)
100 125
FIGURE 3. OUTPUT SOURCE RESISTANCE AS A FUNCTION
OF TEMPERATURE
100
98
TA = 25°C
96 IOUT = 1mA
94
92
90 IOUT = 15mA
88
86
84
82
V+ = +5V
80
100
1K
OSC. FREQUENCY fOSC (Hz)
10K
FIGURE 4. POWER CONVERSION EFFICIENCY AS A
FUNCTION OF OSC. FREQUENCY
10K
1K
100
V+ = 5V
TA = 25°C
10
1.0
10
100
COSC (pF)
1000
10K
FIGURE 5. FREQUENCY OF OSCILLATION AS A FUNCTION
OF EXTERNAL OSC. CAPACITANCE
5
4
TA = 25°C
V+ = +5V
3
2
1
0
-1
-2
-3
-4
SLOPE 55
-5
0 10 20 30 40 50 60 70 80
LOAD CURRENT IL (mA)
FIGURE 7. OUTPUT VOLTAGE AS A FUNCTION OF OUTPUT
CURRENT
20
18
16
14
12
10
8
V+ = +5V
6
-50 -25
0 25 50 75
TEMPERATURE (°C)
100
125
FIGURE 6. UNLOADED OSCILLATOR FREQUENCY AS A
FUNCTION OF TEMPERATURE
100
90 PEFF
80
100
I+ 90
80
70 70
60 60
50 50
40 40
30 30
20
10
0
0
20
TA = 25°C
V+ = +5V
10
0
10 20 30 40 50 60
LOAD CURRENT IL (mA)
FIGURE 8. SUPPLY CURRENT AND POWER CONVERSION
EFFICIENCY AS A FUNCTION OF LOAD
CURRENT
5 FN3072.7
October 10, 2005

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7660CBA arduino
ICL7660, ICL7660A
Other Applications
Further information on the operation and use of the ICL7660
and ICL7660A may be found in AN051 “Principals and
Applications of the ICL7660 and ICL7660A CMOS Voltage
Converter”.
+8V
56K
50K
100K
50K
+8V
-
ICL7611
+
ICL8069
+
100µF -
100
-
10µF
+
18
2 ICL7660 7
ICL7660A
36
45
VOUT
www.DataSheet4U.com
800K
250K
VOLTAGE
ADJUST
-
100µF
+
FIGURE 22. REGULATING THE OUTPUT VOLTAGE
+5V LOGIC SUPPLY
TTL DATA
INPUT
+
10µF -
16
4
18
2 ICL7660 7
3 ICL7660A 6
45
10µF
15
-
+
12 11
1
3
IH5142
13 14
RS232
DATA
OUTPUT
+ 5V
- 5V
FIGURE 23. RS232 LEVELS FROM A SINGLE 5V SUPPLY
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
11 FN3072.7
October 10, 2005

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