The MAX660 monolithic, charge-pump voltage inverterconverts a +1.5V to +5.5V input to a corresponding-1.5V to -5.5V output. Using only two low-costcapacitors, the charge pump’s 100mA output replacesswitching regulators, eliminating inductors and theirassociated cost, size, and EMI. Greater than 90%efficiency over most of its load-current range combinedwith a typical operating current of only 120μA providesideal performance for both battery-powered and boardlevelvoltage conversion applications. The MAX660 canalso double the output voltage of an input power supplyor battery, providing +9.35V at 100mA from a +5Vinput.A frequency control (FC) pin selects either 10kHz typ or80kHz typ (40kHz min) operation to optimize capacitorsize and quiescent current. The oscillator frequencycan also be adjusted with an external capacitor ordriven with an external clock. The MAX660 is a pincompatible,high-current upgrade of the ICL7660.The MAX660 is available in both 8-pin DIP and smalloutlinepackages in commercial, extended, and militarytemperature ranges.For 50mA applications, consider the MAX860/MAX861pin-compatible devices (also available in ultra-smallμMAX packages).________________________ApplicationsLaptop ComputersMedical InstrumentsInterface Power SuppliesHand-Held InstrumentsOperational-Amplifier Power Supplies
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