CMOS Voltage Converters

The ICL7662/Si7661 is a monolithic charge pump voltage inverter that will convert a positive voltage in the range of +4.5V to +20V to the corresponding negative voltage of -4.5V to -20V. The ICL 7662/Si7661 provides performance far superior to previous implementations of charge pump voltage inverters by combining low quiescent current with high efficiency. The ICL7662/Si7661 has an oscillator, control circuitry, and 4 power MOS switches on-chip, with the only required external components being two low cost capacitors.

APPLICATIONS

* Inexpensive Negative Supplies

* Data Acquisition Systems

* Up to -20V for Op Amps, and Other Linear Circuits

* Supply Splitter, VOUT = Vs/2

* RS-232 Power Supplies

* +4.5V to +20V Supply to -4.SV to -20V Output

* Cascaded Voltage Multiplication (VOUT= -n x v•)

* 99.70/o Typical Open Circuit Conversion Efficiency

* Requires Only 2 External Capacitors

* Pin Compatible with the ICL7660