Top Stories New Voltage Convertor Improves on Standard 7660 IC ON Semiconductor releases new NCP7662 IC an Inductorless Voltage Convertor ON Semiconductor has announced the availability of the NCP7662 inductorless DC-to-DC converter. The NCP7662 is a monolithic, high voltage, CMOS switched capacitor voltage converter that offers unique performance advantages over the previously available industry standard 7660. The NCP7662 provides several supply voltage conversion functions and can be used to either double or invert the output voltage. "Although the NCP7662 charge pump provides significant design and performance advantages over the earlier 7660, it still maintains a compatibility with the existing 7660," said Kent Yancik, marketing manager for ON Semiconductor's Analog Integrated Circuit Division. "This new generation of the 7660 is ideal for applications where designers require longer battery life in standby mode, reduced design cycle, improved handling protection and better performance for computers, communication modems and other portable products." Designed to be pin-for-pin compatible with the popular 7660 device, the NCP7662 offers significant improvements over the previously available device. It provides several voltage converter functions. As an inverter, the NCP7662 converts an input range of +1.5 volts to +15 volts, to corresponding output voltages of -1.5 volts to -15 volts. As a voltage doubler, the device doubles the input voltage to a corresponding output and as a multiplier, the input voltage can be multiplied to produce the desired output voltage value. Only two non-critical external capacitors are needed for the charge pump and reservoir functions making this quite a compact, simple and cost effective solution. The capacitors eliminate the EMI effects normally associated with inductors. The NCP7662 is equipped with a boost function that raises the internal oscillator frequency, from 10kHz up to 35kHz, to optimize performance in specific applications. It also offers improved ESD protection of up to 10 kV, 98% power conversion efficiency for 2 mA to 5 mA of load current, efficient voltage conversion of 99.9% unloaded and a low power supply current of 80µA with a 5 volt input. The NCP7662 offers full 1.5 volt to 15 volt power supply operation over the entire temperature range without the need for the need for external diodes, and lower frequency operation is programmable with only an external capacitor. The NCP7662 is available in both a 8-pin SOIC and a 8-pin PDIP package. Both versions of ON Semiconductor's charge pumps represent a pin compatible upgrade to the industry standard 7660 and offer a drop in replacement for competitive 7662 devices. Samples and production quantities for the NCP7662P and NCP7662DR2 inductorless DC-to-DC converters are currently available. The company's Web site address is http://www.onsemi.com/. [Reprinted with kind permission from ON Semiconductor]

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