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ICL7660

更新时间： 2024-11-11 14:58:03
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CMOS Voltage Converters

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ICL7660 数据手册

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DATASHEET  
ICL7660S, ICL7660A  
Super Voltage Converters  
FN3179  
Rev 7.01  
Feb 10, 2020  
The ICL7660S and ICL7660A Super Voltage Converters are  
monolithic CMOS voltage conversion ICs that ensure  
significant performance advantages over other similar  
devices. They are direct replacements for the industry  
standard ICL7660 offering an extended operating supply  
voltage range up to 12V, with lower supply current. 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 on page 3. Critical parameters are  
ensured over the entire commercial and industrial  
temperature ranges.  
Features  
• Ensured Lower Max Supply Current for All Temperature  
Ranges  
• Wide Operating Voltage Range: 1.5V to 12V  
• 100% Tested at 3V  
• Boost Pin (Pin 1) for Higher Switching Frequency  
• Ensured Minimum Power Efficiency of 96%  
• Improved Minimum Open Circuit Voltage Conversion  
Efficiency of 99%  
• Improved SCR Latchup Protection  
The ICL7660S and ICL7660A perform supply voltage  
conversions from positive to negative for an input range of  
1.5V to 12V, resulting in complementary output voltages of  
-1.5V to -12V. Only two non-critical external capacitors are  
needed, for the charge pump and charge reservoir functions.  
The ICL7660S and ICL7660A can be connected to function  
as a voltage doubler and will generate up to 22.8V with a  
12V input. They can also be used as a voltage multipliers or  
voltage dividers.  
• Simple Conversion of +5V Logic Supply to ±5V Supplies  
• Simple Voltage Multiplication V  
= (-)nV  
IN  
OUT  
• Easy to Use; Requires Only Two External Non-Critical  
Passive Components  
• Improved Direct Replacement for Industry Standard  
ICL7660 and Other Second Source Devices  
• Pb-Free Available (RoHS Compliant)  
Each 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.  
Applications  
• Simple Conversion of +5V to ±5V Supplies  
• Voltage Multiplication V  
= ±nV  
IN  
OUT  
• Negative Supplies for Data Acquisition Systems and  
Instrumentation  
• RS232 Power Supplies  
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.  
• Supply Splitter, V  
= ±V  
S
OUT  
In some applications, an external Schottky diode from V  
OUT  
to CAP- is needed to ensure latchup free operation (see Do’s  
and Dont’s section on page 8).  
Pin Configurations  
ICL7660S  
(8 LD PDIP, SOIC)  
TOP VIEW  
ICL7660A  
(8 LD PDIP, SOIC)  
TOP VIEW  
BOOST  
CAP+  
GND  
1
2
3
4
8
7
6
5
V+  
NC  
CAP+  
GND  
1
2
3
4
8
7
6
5
V+  
OSC  
LV  
OSC  
LV  
CAP-  
V
CAP-  
V
OUT  
OUT  
FN3179 Rev 7.01  
Feb 10, 2020  
Page 1 of 14  
1234567...14

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