ICL7660SCBA-T(2008) Просмотр технического описания (PDF) - Intersil
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ICL7660SCBA-T Datasheet PDF : 12 Pages
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Data Sheet
March 6, 2008
ICL7660S
FN3179.5
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 on page 3. 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.
Pinout
ICL7660S
(8 LD PDIP, SOIC)
TOP VIEW
BOOST 1
CAP+ 2
GND 3
CAP- 4
8 V+
7 OSC
6 LV
5 VOUT
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 VOUT = (-)nVIN
• 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 Available (RoHS Compliant)
Applications
• Simple Conversion of +5V to ±5V Supplies
• Voltage Multiplication VOUT = ±nVIN
• Negative Supplies for Data Acquisition Systems and
Instrumentation
• RS232 Power Supplies
• Supply Splitter, VOUT = ±VS/2
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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