The ICL7662 from Maxim Integrated is a versatile monolithic CMOS charge pump voltage converter. This integrated circuit (IC) is designed to provide a simple and efficient solution to invert a positive voltage to a negative one with minimal external components. It is a perfect choice for applications where a negative supply is required from a single positive input.

The ICL7662 operates by transferring charge from a capacitor to the output during different phases of the clock cycle, effectively doubling the input voltage in an inverted state. It can handle an input voltage range from +1.5V to +10V, making it suitable for a variety of low-power applications. The output voltage produced is equal to the negative of the input voltage, with an ability to deliver up to 20mA of output current.

This charge pump voltage converter features an oscillator frequency that can be set by an external capacitor, or the oscillator can be driven by an external clock. This flexibility allows designers to optimize the performance for their specific application needs. Furthermore, the ICL7662 has a low power consumption and a no-load quiescent current of 2mA, which is beneficial for battery-operated devices.

The ICL7662 is available in several package options, including the 8-pin DIP and SOIC, providing compatibility with different types of circuit boards and design preferences. It is commonly used in applications such as operational amplifier power supplies, memory backup power supplies, and in any circuitry where a negative voltage rail is required.

Maxim Integrated's commitment to quality ensures that the ICL7662 meets high standards of performance and reliability. Its ease of use, coupled with its ability to function with minimal external parts, makes it an excellent choice for designers looking to simplify their power supply design while maintaining functionality and efficiency.