Datasheet ICL7660S, ICL7660A (Renesas)

link to page 3 link to page 8 DATASHEET ICL7660S, ICL7660A FN3179 Super Voltage Converters Rev 7.01 Feb 10, 2020 The ICL7660S and ICL7660A Super Voltage Converters are
Features
monolithic CMOS voltage conversion ICs that ensure • Ensured Lower Max Supply Current for All Temperature significant performance advantages over other similar Ranges devices. They are direct replacements for the industry standard ICL7660 offering an
extended
operating supply • Wide Operating Voltage Range: 1.5V to 12V voltage range up to 12V, with
lower
supply current. A • 100% Tested at 3V
Frequency Boost pin
has been incorporated to enable the user to achieve lower output impedance despite using smaller • Boost Pin (Pin 1) for Higher Switching Frequency capacitors. All improvements are highlighted in the “Electrical • Ensured Minimum Power Efficiency of 96% Specifications” section on page 3.
Critical parameters are
• Improved Minimum Open Circuit Voltage Conversion
ensured over the entire commercial and industrial
Efficiency of 99%
temperature ranges.
• Improved SCR Latchup Protection The ICL7660S and ICL7660A perform supply voltage conversions from positive to negative for an input range of • Simple Conversion of +5V Logic Supply to ±5V Supplies 1.5V to 12V, resulting in complementary output voltages of • Simple Voltage Multiplication VOUT = (-)nVIN -1.5V to -12V. Only two non-critical external capacitors are needed, for the charge pump and charge reservoir functions. • Easy to Use; Requires Only Two External Non-Critical Passive Components The ICL7660S and ICL7660A can be connected to function as a voltage doubler and will generate up to 22.8V with a • Improved Direct Replacement for Industry Standard 12V input. They can also be used as a voltage multipliers or ICL7660 and Other Second Source Devices voltage dividers. • Pb-Free Available (RoHS Compliant) Each chip contains a series DC power supply regulator, RC
Applications
oscillator, voltage level translator, and four output power MOS switches. The oscillator, when unloaded, oscillates at a • Simple Conversion of +5V to ±5V Supplies nominal frequency of 10kHz for an input supply voltage of • Voltage Multiplication V 5.0V. This frequency can be lowered by the addition of an OUT = ±nVIN external capacitor to the “OSC” terminal, or the oscillator • Negative Supplies for Data Acquisition Systems and may be over-driven by an external clock. Instrumentation The “LV” terminal may be tied to GND to bypass the internal • RS232 Power Supplies series regulator and improve low voltage (LV) operation. At • Supply Splitter, VOUT = ±VS medium to high voltages (3.5V to 12V), the LV pin is left floating to prevent device latchup. In some applications, an external Schottky diode from VOUT to CAP- is needed to ensure latchup free operation (see Do’s and Dont’s section on page 8).
Pin Configurations ICL7660S ICL7660A (8 LD PDIP, SOIC) (8 LD PDIP, SOIC)
TOP VIEW TOP VIEW
BOOST 1 8 V+ NC 1 8 V+ CAP+ 2 7 OSC CAP+ 2 7 OSC GND 3 6 LV GND 3 6 LV CAP- 4 5 VOUT CAP- 4 5 VOUT
FN3179 Rev 7.01 Page 1 of 14 Feb 10, 2020