The AIC7660PS8TR is a monolithic, CMOS voltage converter that can be used to generate a negative voltage from a positive input voltage. This device is particularly useful in applications where only a positive supply voltage is available but a negative voltage is required for biasing or powering certain components.

Applications

• Generating negative supply voltages for op-amps and data converters.
• Battery-powered devices requiring a negative voltage rail.
• LCD bias supplies.
• Microcontroller power supplies.
• Interface circuits.

Features

• Wide Input Voltage Range: Operates from a wide input voltage range, typically from 1.5V to 10V, providing flexibility in different power supply environments.
• Low Quiescent Current: The device consumes minimal current when not actively converting voltage, extending battery life in portable applications.
• High Voltage Conversion Efficiency: Provides efficient voltage conversion, minimizing power loss and heat generation.
• Simple Operation: Requires only a few external components, simplifying circuit design and reducing board space.
• CMOS Technology: Utilizes CMOS technology for low power consumption and high reliability.
• Output Voltage: Generates an output voltage that is the negative of the input voltage.
• Operating Temperature Range: Typically specified for industrial temperature ranges, ensuring reliable operation in harsh environments.

Benefits

• Eliminates the Need for a Second Power Supply: Simplifies power supply design by generating a negative voltage from a single positive supply.
• Reduces System Cost: Low component count and simple design reduces the overall system cost.
• Extends Battery Life: Low quiescent current and high efficiency maximizes battery life in portable devices.
• Saves Board Space: Small package size and minimal external components enables compact designs.
• Improved System Performance: Stable and regulated negative voltage improves the performance of analog circuits and data converters.

Additional Details

The AIC7660PS8TR utilizes a charge pump principle to invert the input voltage. It contains an oscillator, a voltage translator, and four power MOSFET switches. The external capacitors are used for charge storage and transfer. The device provides a regulated negative output voltage that is approximately equal to the negative of the input voltage. Careful selection of the external capacitors is crucial for optimal performance and efficiency. The datasheet provides detailed guidelines for capacitor selection based on the input voltage and output current requirements.

It is commonly available in an 8-pin package (likely SOIC or TSSOP) which contributes to its ease of use and integration into various applications. The TR suffix suggests tape and reel packaging for automated assembly processes. It is designed for applications requiring a small, efficient, and cost-effective solution for generating negative voltages.