The LM7660IMX is a monolithic CMOS voltage converter manufactured by Texas Instruments (formerly National Semiconductor). This device is designed to convert a positive input voltage to a corresponding negative output voltage. It is commonly used in various applications where a negative voltage supply is needed but only a positive supply is available, such as in LCD bias, op-amp power supplies, and data acquisition systems.

Applications:

• LCD Bias
• Op-Amp Power Supplies
• Data Acquisition Systems
• Handheld Instruments
• Battery-Powered Devices

Features:

• Voltage Conversion: Converts positive input voltage to negative output voltage
• Wide Input Voltage Range: Operates from 1.5V to 10V
• High Conversion Efficiency: Up to 99% conversion efficiency
• Low Quiescent Current: Minimizes power consumption
• Simple External Components: Requires only two external capacitors
• Operating Frequency: 10 kHz typical
• Package Type: SOIC (Small Outline Integrated Circuit)

Benefits:

• Easy Negative Voltage Generation: Simplifies the generation of negative voltage supplies in systems with only a positive supply.
• High Efficiency: Minimizes power loss during voltage conversion, improving system efficiency.
• Low Power Consumption: Reduces overall power consumption, making it suitable for battery-powered applications.
• Simple Design: Requires minimal external components, simplifying circuit design.
• Compact Size: SOIC package allows for compact integration into various systems.

Additional Details:

The LM7660IMX uses a charge pump technique to invert the input voltage, providing a stable and efficient negative voltage output. The device requires only two external capacitors for operation, simplifying the design process. The high conversion efficiency and low quiescent current ensure minimal power loss during voltage conversion.

This voltage converter is an excellent choice for applications requiring a negative voltage supply in systems with only a positive supply. Its robust features and benefits make it suitable for a wide range of industrial and consumer applications.