The NJU7660M-TE3 is a charge pump DC-DC converter manufactured by New Japan Radio (NJR). It's designed to efficiently convert a positive input voltage to a negative output voltage. This converter is commonly used in various portable devices and battery-powered applications where a negative voltage rail is required for specific components or circuits.

Applications

• LCD bias supplies
• Operational amplifier power supplies
• Interface power supplies
• Portable instrumentation
• Battery-powered equipment

Features

• Input Voltage Range: 1.5V to 5.5V
• Output Voltage: Adjustable negative voltage (approximately -Vin)
• Low Quiescent Current: Typically a few microamps, optimizing battery life
• High Conversion Efficiency: Ensures minimal power loss during voltage conversion
• Small Package: Available in compact packages like MSOP or similar for space-constrained applications
• Overload Protection: Includes short-circuit and over-temperature protection mechanisms
• Adjustable Oscillator Frequency: Can be adjusted with an external capacitor

Benefits

• Efficient Voltage Conversion: Provides a stable negative voltage with minimal power loss
• Extended Battery Life: Low quiescent current prolongs the operating time of battery-powered devices
• Compact Design: Small package size enables integration in miniaturized applications
• Enhanced System Reliability: Built-in protection features prevent damage from overloads and short circuits
• Versatile Applications: Suitable for a wide range of voltage conversion requirements
• Simple External Components: Requires minimal external components, simplifying circuit design
• Cost-Effective Solution: Offers a competitive price-performance ratio for negative voltage generation

Additional Details

The NJU7660M-TE3 utilizes charge pump technology to generate the negative voltage. The conversion efficiency can vary depending on the input voltage, output load, and external components used. The output voltage is typically close to the negative of the input voltage, but there may be some voltage drop depending on the load current. The device typically requires an external capacitor for charge pumping and another for output filtering. Detailed specifications, including efficiency curves, ripple voltage, and thermal characteristics, can be found in the NJR product datasheet. It is crucial to select appropriate external components based on the specific application requirements to ensure optimal performance and stability. The operating temperature range typically extends from -40°C to +85°C, making it suitable for a wide range of environments.