Description
The CAT660 is a charge−pump voltage converter. It will invert a 1.5 V to 5.5 V input to a −1.5 V to −5.5 V output. Only two external capacitors are needed. With a guaranteed 100 mA output current capability, the CAT660 can replace a switching regulator and its inductor. Lower EMI is achieved due to the absence of an inductor.
In addition, the CAT660 can double a voltage supplied from a battery or power supply. Inputs from 2.5 V to 5.5 V will yield a doubled, 5 V to 11 V output voltage.

Features
• Replaces MAX660 and LTC®660
• Converts V+ to V− or V+ to 2V+
• Low Output Resistance, 4  Typical
• High Power Efficiency
• Selectable Charge Pump Frequency
    − 10 kHz or 80 kHz
    − Optimize Capacitor Size
• Low Quiescent Current
• Pin−compatible, High−current Alternative to 7660/1044
• Industrial Temperature Range
• Available in 8−pin SOIC and DIP Packages
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant

Applications
• Negative Voltage Generator
• Voltage Doubler
• Voltage Splitter
• Low EMI Power Source
• GaAs FET Biasing
• Lithium Battery Power Supply
• Instrumentation
• LCD Contrast Bias
• Cellular Phones, Pagers